Confused pairs
Incorrect answers between two species (undirected). With a country selected, only mix-ups from games in that country are counted, and only pairs where both species are on that country's checklist are shown.
| Species A (lower id) | Species B (higher id) | Total wrong | A was target → picked B | B was target → picked A |
|---|---|---|---|---|
| Trumpeter Swan Cygnus buccinator | Bewick's Swan Cygnus columbianus | 9 | 4 | 5 |
| Kittlitz's Murrelet Brachyramphus brevirostris | Marbled Murrelet Brachyramphus marmoratus | 8 | 5 | 3 |
| Crested Auklet Aethia cristatella | Parakeet Auklet Aethia psittacula | 8 | 5 | 3 |
| Common Goldeneye Bucephala clangula | Barrow's Goldeneye Bucephala islandica | 7 | 4 | 3 |
| Steller's Eider Polysticta stelleri | Common Eider Somateria mollissima | 7 | 2 | 5 |
| Cassin's Auklet Ptychoramphus aleuticus | Least Auklet Aethia pusilla | 7 | 4 | 3 |
| Least Auklet Aethia pusilla | Crested Auklet Aethia cristatella | 6 | 3 | 3 |
| Tufted Puffin Fratercula cirrhata | Horned Puffin Fratercula corniculata | 6 | 2 | 4 |
| Greater Scaup Aythya marila | Lesser Scaup Aythya affinis | 6 | 4 | 2 |
| King Eider Somateria spectabilis | Common Eider Somateria mollissima | 6 | 3 | 3 |
| Magnificent Frigatebird Fregata magnificens | Great Frigatebird Fregata minor | 6 | 3 | 3 |
| Eurasian Wigeon Mareca penelope | American Wigeon Mareca americana | 6 | 3 | 3 |
| Surf Scoter Melanitta perspicillata | Black Scoter Melanitta americana | 5 | 4 | 1 |
| Snow Goose Anser caerulescens | Ross's Goose Anser rossii | 5 | 3 | 2 |
| Mallard Anas platyrhynchos | American Black Duck Anas rubripes | 5 | 0 | 5 |
| Scripps's Murrelet Synthliboramphus scrippsi | Guadalupe Murrelet Synthliboramphus hypoleucus | 5 | 2 | 3 |
| Slavonian Grebe Podiceps auritus | Black-necked Grebe Podiceps nigricollis | 5 | 2 | 3 |
| Western Meadowlark Sturnella neglecta | Eastern Meadowlark Sturnella magna | 4 | 0 | 4 |
| Cassin's Kingbird Tyrannus vociferans | Western Kingbird Tyrannus verticalis | 4 | 2 | 2 |
| Lucy's Warbler Leiothlypis luciae | Virginia's Warbler Leiothlypis virginiae | 4 | 1 | 3 |
| Brünnich's Guillemot Uria lomvia | Common Guillemot Uria aalge | 4 | 4 | 0 |
| King Eider Somateria spectabilis | Harlequin Duck Histrionicus histrionicus | 4 | 2 | 2 |
| White-winged Scoter Melanitta deglandi | Black Scoter Melanitta americana | 4 | 4 | 0 |
| Red-necked Grebe Podiceps grisegena | Black-necked Grebe Podiceps nigricollis | 4 | 2 | 2 |
| Long-billed Murrelet Brachyramphus perdix | Kittlitz's Murrelet Brachyramphus brevirostris | 4 | 1 | 3 |
| Northern Flicker Colaptes auratus | Gilded Flicker Colaptes chrysoides | 4 | 0 | 4 |
| Lincoln's Sparrow Melospiza lincolnii | Swamp Sparrow Melospiza georgiana | 4 | 1 | 3 |
| Ring-necked Duck Aythya collaris | Greater Scaup Aythya marila | 4 | 4 | 0 |
| Philadelphia Vireo Vireo philadelphicus | Warbling Vireo Vireo gilvus | 3 | 1 | 2 |
| Common Nighthawk Chordeiles minor | Common Poorwill Phalaenoptilus nuttallii | 3 | 1 | 2 |
| Blackpoll Warbler Setophaga striata | Pine Warbler Setophaga pinus | 3 | 2 | 1 |
| Black Scoter Melanitta americana | Long-tailed Duck Clangula hyemalis | 3 | 0 | 3 |
| Black-legged Kittiwake Rissa tridactyla | Sabine's Gull Xema sabini | 3 | 1 | 2 |
| Fulvous Whistling-Duck Dendrocygna bicolor | Emperor Goose Anser canagicus | 3 | 1 | 2 |
| Bulwer's Petrel Bulweria bulwerii | Flesh-footed Shearwater Ardenna carneipes | 3 | 3 | 0 |
| Buff-bellied Pipit Anthus rubescens | Sprague's Pipit Anthus spragueii | 3 | 1 | 2 |
| Greater White-fronted Goose Anser albifrons | Pink-footed Goose Anser brachyrhynchus | 3 | 3 | 0 |
| Brown-chested Martin Progne tapera | Northern Rough-winged Swallow Stelgidopteryx serripennis | 3 | 3 | 0 |
| Least Auklet Aethia pusilla | Parakeet Auklet Aethia psittacula | 3 | 3 | 0 |
| Hooded Merganser Lophodytes cucullatus | Goosander Mergus merganser | 3 | 1 | 2 |
| Hermit Warbler Setophaga occidentalis | Golden-cheeked Warbler Setophaga chrysoparia | 3 | 2 | 1 |
| Pacific Wren Troglodytes pacificus | Winter Wren Troglodytes hiemalis | 3 | 0 | 3 |
| Black Tern Chlidonias niger | White-winged Black Tern Chlidonias leucopterus | 3 | 0 | 3 |
| Red-billed Tropicbird Phaethon aethereus | Red-tailed Tropicbird Phaethon rubricauda | 3 | 1 | 2 |
| Baird's Sandpiper Calidris bairdii | Pectoral Sandpiper Calidris melanotos | 3 | 3 | 0 |
| Goosander Mergus merganser | Red-breasted Merganser Mergus serrator | 3 | 1 | 2 |
| Louisiana Waterthrush Parkesia motacilla | Northern Waterthrush Parkesia noveboracensis | 3 | 2 | 1 |
| Ancient Murrelet Synthliboramphus antiquus | Scripps's Murrelet Synthliboramphus scrippsi | 3 | 1 | 2 |
| Willow Ptarmigan Lagopus lagopus | Shore Lark Eremophila alpestris | 3 | 0 | 3 |
| Bewick's Swan Cygnus columbianus | Whooper Swan Cygnus cygnus | 3 | 1 | 2 |
| Band-rumped Storm-Petrel Hydrobates castro | Wedge-rumped Storm-Petrel Hydrobates tethys | 3 | 1 | 2 |
| Canvasback Aythya valisineria | Redhead Aythya americana | 3 | 0 | 3 |
| Sanderling Calidris alba | Rock Sandpiper Calidris ptilocnemis | 3 | 3 | 0 |
| American Black Duck Anas rubripes | Mottled Duck Anas fulvigula | 3 | 3 | 0 |
| Blue-grey Gnatcatcher Polioptila caerulea | Black-tailed Gnatcatcher Polioptila melanura | 3 | 1 | 2 |
| Purple Martin Progne subis | Northern Rough-winged Swallow Stelgidopteryx serripennis | 3 | 1 | 2 |
| California Quail Callipepla californica | Gambel's Quail Callipepla gambelii | 3 | 1 | 2 |
| Ancient Murrelet Synthliboramphus antiquus | Craveri's Murrelet Synthliboramphus craveri | 3 | 2 | 1 |
| American Goldfinch Spinus tristis | Redpoll Acanthis flammea | 3 | 0 | 3 |
| Dusky Flycatcher Empidonax oberholseri | Western Flycatcher Empidonax difficilis | 2 | 1 | 1 |
| Barrow's Goldeneye Bucephala islandica | Hooded Merganser Lophodytes cucullatus | 2 | 1 | 1 |
| Kelp Gull Larus dominicanus | Lesser Black-backed Gull Larus fuscus | 2 | 2 | 0 |
| Red-necked Grebe Podiceps grisegena | Western Grebe Aechmophorus occidentalis | 2 | 0 | 2 |
| Smew Mergellus albellus | Goosander Mergus merganser | 2 | 1 | 1 |
| Western Cattle-Egret Ardea ibis | Great White Egret Ardea alba | 2 | 2 | 0 |
| Glaucous Gull Larus hyperboreus | California Gull Larus californicus | 2 | 1 | 1 |
| Trumpeter Swan Cygnus buccinator | Whooper Swan Cygnus cygnus | 2 | 0 | 2 |
| Rusty Blackbird Euphagus carolinus | Brewer's Blackbird Euphagus cyanocephalus | 2 | 1 | 1 |
| Ash-throated Flycatcher Myiarchus cinerascens | Brown-crested Flycatcher Myiarchus tyrannulus | 2 | 1 | 1 |
| Common Grackle Quiscalus quiscula | Great-tailed Grackle Quiscalus mexicanus | 2 | 1 | 1 |
| Northern Bobwhite Colinus virginianus | Scaled Quail Callipepla squamata | 2 | 2 | 0 |
| Great Crested Flycatcher Myiarchus crinitus | Brown-crested Flycatcher Myiarchus tyrannulus | 2 | 0 | 2 |
| Swainson's Thrush Catharus ustulatus | Hermit Thrush Catharus guttatus | 2 | 0 | 2 |
| Ring-necked Duck Aythya collaris | Lesser Scaup Aythya affinis | 2 | 2 | 0 |
| Wood Thrush Hylocichla mustelina | Song Thrush Turdus philomelos | 2 | 0 | 2 |
| Common Shelduck Tadorna tadorna | Muscovy Duck Cairina moschata | 2 | 1 | 1 |
| Falcated Duck Mareca falcata | Eurasian Wigeon Mareca penelope | 2 | 1 | 1 |
| Tufted Duck Aythya fuligula | Greater Scaup Aythya marila | 2 | 2 | 0 |
| Redwing Turdus iliacus | Swainson's Warbler Limnothlypis swainsonii | 2 | 2 | 0 |
| White-rumped Sandpiper Calidris fuscicollis | Least Sandpiper Calidris minutilla | 2 | 2 | 0 |
| American Robin Turdus migratorius | Brown-headed Cowbird Molothrus ater | 2 | 1 | 1 |
| Mourning Warbler Geothlypis philadelphia | Hooded Warbler Setophaga citrina | 2 | 2 | 0 |
| Muscovy Duck Cairina moschata | Wood Duck Aix sponsa | 2 | 1 | 1 |
| Arctic Skua Stercorarius parasiticus | Pomarine Skua Stercorarius pomarinus | 2 | 1 | 1 |
| Bohemian Waxwing Bombycilla garrulus | Cedar Waxwing Bombycilla cedrorum | 2 | 2 | 0 |
| Savanna Hawk Buteogallus meridionalis | Harris's Hawk Parabuteo unicinctus | 2 | 1 | 1 |
| Harris's Hawk Parabuteo unicinctus | Red-shouldered Hawk Buteo lineatus | 2 | 2 | 0 |
| Lesser Nighthawk Chordeiles acutipennis | Chuck-will's-widow Antrostomus carolinensis | 2 | 0 | 2 |
| Red-shouldered Hawk Buteo lineatus | Broad-winged Hawk Buteo platypterus | 2 | 1 | 1 |
| Bay-breasted Warbler Setophaga castanea | Chestnut-sided Warbler Setophaga pensylvanica | 2 | 2 | 0 |
| Red-shouldered Hawk Buteo lineatus | Short-tailed Hawk Buteo brachyurus | 2 | 2 | 0 |
| Short-tailed Hawk Buteo brachyurus | Swainson's Hawk Buteo swainsoni | 2 | 0 | 2 |
| Short-tailed Hawk Buteo brachyurus | Rough-legged Buzzard Buteo lagopus | 2 | 0 | 2 |
| White-tailed Tropicbird Phaethon lepturus | Red-tailed Tropicbird Phaethon rubricauda | 2 | 0 | 2 |
| Fulvous Whistling-Duck Dendrocygna bicolor | Snow Goose Anser caerulescens | 2 | 0 | 2 |
| Swainson's Hawk Buteo swainsoni | Ferruginous Hawk Buteo regalis | 2 | 1 | 1 |
| Common Eider Somateria mollissima | Surf Scoter Melanitta perspicillata | 2 | 1 | 1 |
| Townsend's Warbler Setophaga townsendi | Black-throated Green Warbler Setophaga virens | 2 | 2 | 0 |
| Rough-legged Buzzard Buteo lagopus | Ferruginous Hawk Buteo regalis | 2 | 0 | 2 |
| Red-faced Warbler Cardellina rubrifrons | Painted Redstart Myioborus pictus | 2 | 2 | 0 |
| Cassin's Auklet Ptychoramphus aleuticus | Crested Auklet Aethia cristatella | 2 | 1 | 1 |
| Common Rosefinch Carpodacus erythrinus | Purple Finch Haemorhous purpureus | 2 | 2 | 0 |
| Western Screech-Owl Megascops kennicottii | Eastern Screech-Owl Megascops asio | 2 | 0 | 2 |
| Western Tanager Piranga ludoviciana | Flame-coloured Tanager Piranga bidentata | 2 | 0 | 2 |
| Antipodean Albatross Diomedea antipodensis | Short-tailed Albatross Phoebastria albatrus | 2 | 0 | 2 |
| Northern Pygmy-Owl Glaucidium gnoma | Ferruginous Pygmy-Owl Glaucidium brasilianum | 2 | 0 | 2 |
| Cackling Goose Branta hutchinsii | Canada Goose Branta canadensis | 2 | 0 | 2 |
| American Crow Corvus brachyrhynchos | Common Grackle Quiscalus quiscula | 2 | 1 | 1 |
| House Finch Haemorhous mexicanus | Purple Finch Haemorhous purpureus | 2 | 0 | 2 |
| Short-tailed Albatross Phoebastria albatrus | White-capped Albatross Thalassarche cauta | 2 | 1 | 1 |
| Purple Finch Haemorhous purpureus | Cassin's Finch Haemorhous cassinii | 2 | 0 | 2 |
| American Herring Gull Larus smithsonianus | Vega Gull Larus vegae | 2 | 0 | 2 |
| Black-capped Chickadee Poecile atricapillus | Chestnut-backed Chickadee Poecile rufescens | 2 | 1 | 1 |
| Mexican Duck Anas diazi | Mottled Duck Anas fulvigula | 2 | 2 | 0 |
| Chestnut-backed Chickadee Poecile rufescens | Boreal Chickadee Poecile hudsonicus | 2 | 1 | 1 |
| Chestnut-backed Chickadee Poecile rufescens | Bridled Titmouse Baeolophus wollweberi | 2 | 1 | 1 |
| Wood Duck Aix sponsa | Garganey Spatula querquedula | 2 | 2 | 0 |
| Leach's Storm-Petrel Hydrobates leucorhous | Townsend's Storm-Petrel Hydrobates socorroensis | 2 | 1 | 1 |
| Townsend's Storm-Petrel Hydrobates socorroensis | Band-rumped Storm-Petrel Hydrobates castro | 2 | 2 | 0 |
| Common Crossbill Loxia curvirostra | Cassia Crossbill Loxia sinesciuris | 2 | 0 | 2 |
| Red-breasted Sapsucker Sphyrapicus ruber | Red-headed Woodpecker Melanerpes erythrocephalus | 2 | 1 | 1 |
| Rivoli's Hummingbird Eugenes fulgens | Violet-crowned Hummingbird Ramosomyia violiceps | 2 | 1 | 1 |
| Golden-fronted Woodpecker Melanerpes aurifrons | Red-bellied Woodpecker Melanerpes carolinus | 2 | 2 | 0 |
| Marbled Murrelet Brachyramphus marmoratus | Common Guillemot Uria aalge | 2 | 1 | 1 |
| American Three-toed Woodpecker Picoides dorsalis | Black-backed Woodpecker Picoides arcticus | 2 | 1 | 1 |
| White-winged Scoter Melanitta deglandi | Stejneger's Scoter Melanitta stejnegeri | 2 | 1 | 1 |
| Brünnich's Guillemot Uria lomvia | Ancient Murrelet Synthliboramphus antiquus | 2 | 2 | 0 |
| Sand Martin Riparia riparia | Tree Swallow Tachycineta bicolor | 2 | 1 | 1 |
| Ruby-throated Hummingbird Archilochus colubris | Anna's Hummingbird Calypte anna | 2 | 1 | 1 |
| Lapland Bunting Calcarius lapponicus | Northern Cardinal Cardinalis cardinalis | 2 | 1 | 1 |
| Ancient Murrelet Synthliboramphus antiquus | Guadalupe Murrelet Synthliboramphus hypoleucus | 2 | 2 | 0 |
| Tree Swallow Tachycineta bicolor | Redpoll Acanthis flammea | 2 | 1 | 1 |
| Purple Martin Progne subis | Barn Swallow Hirundo rustica | 2 | 1 | 1 |
| Purple Martin Progne subis | Cliff Swallow Petrochelidon pyrrhonota | 2 | 2 | 0 |
| Scripps's Murrelet Synthliboramphus scrippsi | Craveri's Murrelet Synthliboramphus craveri | 2 | 0 | 2 |
| Guadalupe Murrelet Synthliboramphus hypoleucus | Craveri's Murrelet Synthliboramphus craveri | 2 | 0 | 2 |
| Purple Martin Progne subis | Brown-headed Cowbird Molothrus ater | 2 | 2 | 0 |
| Purple Martin Progne subis | Common Grackle Quiscalus quiscula | 2 | 2 | 0 |
| Gyr Falcon Falco rusticolus | Prairie Falcon Falco mexicanus | 2 | 2 | 0 |
| Northern Rough-winged Swallow Stelgidopteryx serripennis | Cliff Swallow Petrochelidon pyrrhonota | 2 | 2 | 0 |
| Barn Swallow Hirundo rustica | Cliff Swallow Petrochelidon pyrrhonota | 2 | 2 | 0 |
| Pink-footed Shearwater Ardenna creatopus | Flesh-footed Shearwater Ardenna carneipes | 2 | 0 | 2 |
| Blue-winged Teal Spatula discors | Northern Shoveler Spatula clypeata | 2 | 2 | 0 |
| Black-chinned Hummingbird Archilochus alexandri | Anna's Hummingbird Calypte anna | 2 | 2 | 0 |
| Dark-eyed Junco Junco hyemalis | Redpoll Acanthis flammea | 2 | 0 | 2 |
| White-crowned Sparrow Zonotrichia leucophrys | Brown-headed Cowbird Molothrus ater | 2 | 0 | 2 |
| Black-legged Kittiwake Rissa tridactyla | Common Grackle Quiscalus quiscula | 2 | 0 | 2 |
| Harris's Sparrow Zonotrichia querula | Sagebrush Sparrow Artemisiospiza nevadensis | 2 | 1 | 1 |
| Black Scoter Melanitta americana | Bufflehead Bucephala albeola | 2 | 0 | 2 |
| Northern Beardless-Tyrannulet Camptostoma imberbe | Olive-sided Flycatcher Contopus cooperi | 2 | 2 | 0 |
| Willow Ptarmigan Lagopus lagopus | Lapland Bunting Calcarius lapponicus | 2 | 1 | 1 |
| Sooty Shearwater Ardenna grisea | Newell's Shearwater Puffinus newelli | 2 | 0 | 2 |
| Bushtit Psaltriparus minimus | Wrentit Chamaea fasciata | 2 | 1 | 1 |
| Olive-sided Flycatcher Contopus cooperi | Eastern Wood-Pewee Contopus virens | 2 | 0 | 2 |
| Nelson's Sparrow Ammospiza nelsoni | Savannah Sparrow Passerculus sandwichensis | 2 | 1 | 1 |
| Laughing Gull Leucophaeus atricilla | Franklin's Gull Leucophaeus pipixcan | 2 | 0 | 2 |
| Spotted Sandpiper Actitis macularius | Solitary Sandpiper Tringa solitaria | 2 | 1 | 1 |
| White-breasted Nuthatch Sitta carolinensis | Pygmy Nuthatch Sitta pygmaea | 2 | 0 | 2 |
| Long-tailed Duck Clangula hyemalis | Common Goldeneye Bucephala clangula | 2 | 1 | 1 |
| Emperor Goose Anser canagicus | Snow Goose Anser caerulescens | 2 | 1 | 1 |
| Bufflehead Bucephala albeola | Barrow's Goldeneye Bucephala islandica | 2 | 0 | 2 |
| Alder Flycatcher Empidonax alnorum | Willow Flycatcher Empidonax traillii | 2 | 0 | 2 |
| Ridgway's Rail Rallus obsoletus | Clapper Rail Rallus crepitans | 2 | 1 | 1 |
| Masked Booby Sula dactylatra | Cocos Booby Sula brewsteri | 2 | 0 | 2 |
| Western Meadowlark Sturnella neglecta | Chihuahuan Meadowlark Sturnella lilianae | 2 | 0 | 2 |
| Wandering Tattler Tringa incana | Lesser Yellowlegs Tringa flavipes | 2 | 2 | 0 |
| Least Flycatcher Empidonax minimus | Hammond's Flycatcher Empidonax hammondii | 2 | 2 | 0 |
| Common Goldeneye Bucephala clangula | Goosander Mergus merganser | 2 | 2 | 0 |
| Greylag Goose Anser anser | Greater White-fronted Goose Anser albifrons | 2 | 1 | 1 |
| Double-crested Cormorant Nannopterum auritum | Neotropic Cormorant Nannopterum brasilianum | 2 | 0 | 2 |
| Mountain Plover Anarhynchus montanus | Temminck's Stint Calidris temminckii | 1 | 1 | 0 |
| Northern Jacana Jacana spinosa | Whimbrel Numenius phaeopus | 1 | 1 | 0 |
| Upland Sandpiper Bartramia longicauda | Whimbrel Numenius phaeopus | 1 | 1 | 0 |
| Upland Sandpiper Bartramia longicauda | Long-billed Curlew Numenius americanus | 1 | 0 | 1 |
| Upland Sandpiper Bartramia longicauda | Marbled Godwit Limosa fedoa | 1 | 1 | 0 |
| Whimbrel Numenius phaeopus | Long-billed Curlew Numenius americanus | 1 | 0 | 1 |
| Whimbrel Numenius phaeopus | Black-chinned Sparrow Spizella atrogularis | 1 | 0 | 1 |
| Little Whimbrel Numenius minutus | Hudsonian Godwit Limosa haemastica | 1 | 1 | 0 |
| Bar-tailed Godwit Limosa lapponica | Hudsonian Godwit Limosa haemastica | 1 | 1 | 0 |
| Bar-tailed Godwit Limosa lapponica | Marbled Godwit Limosa fedoa | 1 | 1 | 0 |
| Hudsonian Godwit Limosa haemastica | Marbled Godwit Limosa fedoa | 1 | 1 | 0 |
| Marbled Godwit Limosa fedoa | Grey Phalarope Phalaropus fulicarius | 1 | 0 | 1 |
| Short-billed Dowitcher Limnodromus griseus | Long-billed Dowitcher Limnodromus scolopaceus | 1 | 1 | 0 |
| Short-billed Dowitcher Limnodromus griseus | American Woodcock Scolopax minor | 1 | 0 | 1 |
| Short-billed Dowitcher Limnodromus griseus | Wilson's Snipe Gallinago delicata | 1 | 1 | 0 |
| American Woodcock Scolopax minor | Wilson's Snipe Gallinago delicata | 1 | 1 | 0 |
| Common Snipe Gallinago gallinago | Wilson's Snipe Gallinago delicata | 1 | 1 | 0 |
| Wilson's Snipe Gallinago delicata | American Bittern Botaurus lentiginosus | 1 | 1 | 0 |
| Wilson's Snipe Gallinago delicata | Chestnut-sided Warbler Setophaga pensylvanica | 1 | 0 | 1 |
| Wilson's Phalarope Phalaropus tricolor | Hooded Oriole Icterus cucullatus | 1 | 0 | 1 |
| Red-necked Phalarope Phalaropus lobatus | Wandering Tattler Tringa incana | 1 | 1 | 0 |
| Red-necked Phalarope Phalaropus lobatus | Eared Quetzal Euptilotis neoxenus | 1 | 1 | 0 |
| Terek Sandpiper Xenus cinereus | Spotted Sandpiper Actitis macularius | 1 | 0 | 1 |
| Terek Sandpiper Xenus cinereus | Solitary Sandpiper Tringa solitaria | 1 | 1 | 0 |
| Spotted Sandpiper Actitis macularius | Marsh Sandpiper Tringa stagnatilis | 1 | 1 | 0 |
| Spotted Sandpiper Actitis macularius | Buff-bellied Pipit Anthus rubescens | 1 | 0 | 1 |
| Solitary Sandpiper Tringa solitaria | Wandering Tattler Tringa incana | 1 | 1 | 0 |
| Solitary Sandpiper Tringa solitaria | Lesser Yellowlegs Tringa flavipes | 1 | 1 | 0 |
| Grey-tailed Tattler Tringa brevipes | Wandering Tattler Tringa incana | 1 | 1 | 0 |
| Wandering Tattler Tringa incana | Snow Bunting Plectrophenax nivalis | 1 | 0 | 1 |
| Marsh Sandpiper Tringa stagnatilis | Wood Sandpiper Tringa glareola | 1 | 0 | 1 |
| Marsh Sandpiper Tringa stagnatilis | Willet Tringa semipalmata | 1 | 1 | 0 |
| Common Greenshank Tringa nebularia | Greater Yellowlegs Tringa melanoleuca | 1 | 1 | 0 |
| Greater Yellowlegs Tringa melanoleuca | Rose-throated Becard Pachyramphus aglaiae | 1 | 1 | 0 |
| Black Turnstone Arenaria melanocephala | Great Knot Calidris tenuirostris | 1 | 1 | 0 |
| Black Turnstone Arenaria melanocephala | Glaucous Gull Larus hyperboreus | 1 | 1 | 0 |
| Red Knot Calidris canutus | Sprague's Pipit Anthus spragueii | 1 | 1 | 0 |
| Ruff Calidris pugnax | Sharp-tailed Sandpiper Calidris acuminata | 1 | 0 | 1 |
| Ruff Calidris pugnax | Curlew Sandpiper Calidris ferruginea | 1 | 1 | 0 |
| Sharp-tailed Sandpiper Calidris acuminata | Pectoral Sandpiper Calidris melanotos | 1 | 1 | 0 |
| Stilt Sandpiper Calidris himantopus | Dunlin Calidris alpina | 1 | 0 | 1 |
| Temminck's Stint Calidris temminckii | Sanderling Calidris alba | 1 | 1 | 0 |
| Temminck's Stint Calidris temminckii | Black-crowned Night Heron Nycticorax nycticorax | 1 | 0 | 1 |
| Long-toed Stint Calidris subminuta | Rock Sandpiper Calidris ptilocnemis | 1 | 1 | 0 |
| Long-toed Stint Calidris subminuta | Least Sandpiper Calidris minutilla | 1 | 1 | 0 |
| Red-necked Stint Calidris ruficollis | Little Stint Calidris minuta | 1 | 1 | 0 |
| Sanderling Calidris alba | Dunlin Calidris alpina | 1 | 0 | 1 |
| Purple Sandpiper Calidris maritima | Rock Sandpiper Calidris ptilocnemis | 1 | 1 | 0 |
| Rock Sandpiper Calidris ptilocnemis | Brown-crested Flycatcher Myiarchus tyrannulus | 1 | 0 | 1 |
| Little Stint Calidris minuta | White-rumped Sandpiper Calidris fuscicollis | 1 | 0 | 1 |
| White-rumped Sandpiper Calidris fuscicollis | Ivory Gull Pagophila eburnea | 1 | 0 | 1 |
| Pectoral Sandpiper Calidris melanotos | Semipalmated Sandpiper Calidris pusilla | 1 | 0 | 1 |
| Western Sandpiper Calidris mauri | Semipalmated Sandpiper Calidris pusilla | 1 | 0 | 1 |
| Semipalmated Sandpiper Calidris pusilla | Pomarine Skua Stercorarius pomarinus | 1 | 0 | 1 |
| Pomarine Skua Stercorarius pomarinus | Laughing Gull Leucophaeus atricilla | 1 | 1 | 0 |
| Rhinoceros Auklet Cerorhinca monocerata | Least Auklet Aethia pusilla | 1 | 1 | 0 |
| Rhinoceros Auklet Cerorhinca monocerata | Crested Auklet Aethia cristatella | 1 | 1 | 0 |
| Rhinoceros Auklet Cerorhinca monocerata | Craveri's Murrelet Synthliboramphus craveri | 1 | 0 | 1 |
| Tufted Puffin Fratercula cirrhata | Cassin's Auklet Ptychoramphus aleuticus | 1 | 1 | 0 |
| Tufted Puffin Fratercula cirrhata | Crested Myna Acridotheres cristatellus | 1 | 0 | 1 |
| Horned Puffin Fratercula corniculata | Cassin's Auklet Ptychoramphus aleuticus | 1 | 1 | 0 |
| Cassin's Auklet Ptychoramphus aleuticus | Kittlitz's Murrelet Brachyramphus brevirostris | 1 | 0 | 1 |
| Least Auklet Aethia pusilla | Guadalupe Murrelet Synthliboramphus hypoleucus | 1 | 0 | 1 |
| Crested Auklet Aethia cristatella | Great-tailed Grackle Quiscalus mexicanus | 1 | 1 | 0 |
| Long-billed Murrelet Brachyramphus perdix | Marbled Murrelet Brachyramphus marmoratus | 1 | 0 | 1 |
| Kittlitz's Murrelet Brachyramphus brevirostris | Eared Quetzal Euptilotis neoxenus | 1 | 0 | 1 |
| Marbled Murrelet Brachyramphus marmoratus | Brünnich's Guillemot Uria lomvia | 1 | 1 | 0 |
| Pigeon Guillemot Cepphus columba | Common Guillemot Uria aalge | 1 | 1 | 0 |
| Brünnich's Guillemot Uria lomvia | Scripps's Murrelet Synthliboramphus scrippsi | 1 | 1 | 0 |
| Common Guillemot Uria aalge | Guadalupe Murrelet Synthliboramphus hypoleucus | 1 | 1 | 0 |
| Common Guillemot Uria aalge | Craveri's Murrelet Synthliboramphus craveri | 1 | 0 | 1 |
| Little Gull Hydrocoloeus minutus | Black-legged Kittiwake Rissa tridactyla | 1 | 0 | 1 |
| Black-legged Kittiwake Rissa tridactyla | Military Macaw Ara militaris | 1 | 0 | 1 |
| Black-legged Kittiwake Rissa tridactyla | Dark-eyed Junco Junco hyemalis | 1 | 0 | 1 |
| Black-legged Kittiwake Rissa tridactyla | Brown-headed Cowbird Molothrus ater | 1 | 0 | 1 |
| Red-legged Kittiwake Rissa brevirostris | Bonaparte's Gull Chroicocephalus philadelphia | 1 | 1 | 0 |
| Bonaparte's Gull Chroicocephalus philadelphia | Laughing Gull Leucophaeus atricilla | 1 | 0 | 1 |
| Bonaparte's Gull Chroicocephalus philadelphia | Franklin's Gull Leucophaeus pipixcan | 1 | 1 | 0 |
| Laughing Gull Leucophaeus atricilla | Black-tailed Gull Larus crassirostris | 1 | 1 | 0 |
| Laughing Gull Leucophaeus atricilla | California Gull Larus californicus | 1 | 1 | 0 |
| Laughing Gull Leucophaeus atricilla | Arctic Tern Sterna paradisaea | 1 | 0 | 1 |
| Franklin's Gull Leucophaeus pipixcan | Belcher's Gull Larus belcheri | 1 | 1 | 0 |
| Franklin's Gull Leucophaeus pipixcan | Black-tailed Gull Larus crassirostris | 1 | 1 | 0 |
| Belcher's Gull Larus belcheri | Heermann's Gull Larus heermanni | 1 | 1 | 0 |
| Belcher's Gull Larus belcheri | Waved Albatross Phoebastria irrorata | 1 | 0 | 1 |
| Common Gull Larus canus | Short-billed Gull Larus brachyrhynchus | 1 | 0 | 1 |
| Common Gull Larus canus | Ring-billed Gull Larus delawarensis | 1 | 1 | 0 |
| Short-billed Gull Larus brachyrhynchus | Kelp Gull Larus dominicanus | 1 | 1 | 0 |
| Short-billed Gull Larus brachyrhynchus | Iceland Gull Larus glaucoides | 1 | 1 | 0 |
| Western Gull Larus occidentalis | Great Black-backed Gull Larus marinus | 1 | 0 | 1 |
| Western Gull Larus occidentalis | Vega Gull Larus vegae | 1 | 0 | 1 |
| Kelp Gull Larus dominicanus | Glaucous Gull Larus hyperboreus | 1 | 0 | 1 |
| Kelp Gull Larus dominicanus | Wedge-rumped Storm-Petrel Hydrobates tethys | 1 | 1 | 0 |
| Great Black-backed Gull Larus marinus | Glaucous Gull Larus hyperboreus | 1 | 1 | 0 |
| Glaucous Gull Larus hyperboreus | Pink-footed Shearwater Ardenna creatopus | 1 | 0 | 1 |
| Glaucous Gull Larus hyperboreus | American Herring Gull Larus smithsonianus | 1 | 0 | 1 |
| California Gull Larus californicus | American Herring Gull Larus smithsonianus | 1 | 1 | 0 |
| Glaucous-winged Gull Larus glaucescens | Tree Swallow Tachycineta bicolor | 1 | 0 | 1 |
| Glaucous-winged Gull Larus glaucescens | Lapland Bunting Calcarius lapponicus | 1 | 1 | 0 |
| Glaucous-winged Gull Larus glaucescens | Northern Cardinal Cardinalis cardinalis | 1 | 0 | 1 |
| Iceland Gull Larus glaucoides | American Herring Gull Larus smithsonianus | 1 | 1 | 0 |
| Sooty Tern Onychoprion fuscatus | Bridled Tern Onychoprion anaethetus | 1 | 0 | 1 |
| Sooty Tern Onychoprion fuscatus | Least Tern Sternula antillarum | 1 | 1 | 0 |
| Sooty Tern Onychoprion fuscatus | Gull-billed Tern Gelochelidon nilotica | 1 | 1 | 0 |
| Bridled Tern Onychoprion anaethetus | Gull-billed Tern Gelochelidon nilotica | 1 | 1 | 0 |
| Gull-billed Tern Gelochelidon nilotica | White-winged Black Tern Chlidonias leucopterus | 1 | 1 | 0 |
| Gull-billed Tern Gelochelidon nilotica | Elegant Tern Thalasseus elegans | 1 | 1 | 0 |
| Black Tern Chlidonias niger | Forster's Tern Sterna forsteri | 1 | 0 | 1 |
| White-winged Black Tern Chlidonias leucopterus | Forster's Tern Sterna forsteri | 1 | 1 | 0 |
| Forster's Tern Sterna forsteri | Arctic Tern Sterna paradisaea | 1 | 1 | 0 |
| Forster's Tern Sterna forsteri | Common Tern Sterna hirundo | 1 | 0 | 1 |
| Forster's Tern Sterna forsteri | Winter Wren Troglodytes hiemalis | 1 | 0 | 1 |
| Arctic Tern Sterna paradisaea | Cape May Warbler Setophaga tigrina | 1 | 0 | 1 |
| Common Tern Sterna hirundo | Royal Tern Thalasseus maximus | 1 | 0 | 1 |
| Common Tern Sterna hirundo | Zebra Finch Taeniopygia guttata | 1 | 1 | 0 |
| Sandwich Tern Thalasseus sandvicensis | Red-tailed Tropicbird Phaethon rubricauda | 1 | 0 | 1 |
| Sandwich Tern Thalasseus sandvicensis | Fork-tailed Storm-Petrel Hydrobates furcatus | 1 | 1 | 0 |
| Elegant Tern Thalasseus elegans | Royal Tern Thalasseus maximus | 1 | 0 | 1 |
| Royal Tern Thalasseus maximus | Red-billed Tropicbird Phaethon aethereus | 1 | 0 | 1 |
| White-tailed Tropicbird Phaethon lepturus | Ainley's Storm-Petrel Hydrobates cheimomnestes | 1 | 0 | 1 |
| White-tailed Tropicbird Phaethon lepturus | Wood Stork Mycteria americana | 1 | 0 | 1 |
| White-tailed Tropicbird Phaethon lepturus | Northern Mockingbird Mimus polyglottos | 1 | 0 | 1 |
| Red-throated Diver Gavia stellata | Pacific Diver Gavia pacifica | 1 | 1 | 0 |
| Red-throated Diver Gavia stellata | Great Northern Diver Gavia immer | 1 | 1 | 0 |
| Laysan Albatross Phoebastria immutabilis | Short-tailed Albatross Phoebastria albatrus | 1 | 0 | 1 |
| Black-footed Albatross Phoebastria nigripes | Short-tailed Albatross Phoebastria albatrus | 1 | 0 | 1 |
| Black-footed Albatross Phoebastria nigripes | Light-mantled Albatross Phoebetria palpebrata | 1 | 0 | 1 |
| Short-tailed Albatross Phoebastria albatrus | Salvin's Albatross Thalassarche salvini | 1 | 0 | 1 |
| Light-mantled Albatross Phoebetria palpebrata | White-capped Albatross Thalassarche cauta | 1 | 0 | 1 |
| Wilson's Storm-Petrel Oceanites oceanicus | Townsend's Storm-Petrel Hydrobates socorroensis | 1 | 0 | 1 |
| Wilson's Storm-Petrel Oceanites oceanicus | Redpoll Acanthis flammea | 1 | 1 | 0 |
| Ainley's Storm-Petrel Hydrobates cheimomnestes | Ashy Storm-Petrel Hydrobates homochroa | 1 | 0 | 1 |
| Band-rumped Storm-Petrel Hydrobates castro | Mottled Petrel Pterodroma inexpectata | 1 | 1 | 0 |
| Band-rumped Storm-Petrel Hydrobates castro | Glossy Ibis Plegadis falcinellus | 1 | 0 | 1 |
| Wedge-rumped Storm-Petrel Hydrobates tethys | Black Storm-Petrel Hydrobates melania | 1 | 1 | 0 |
| Wedge-rumped Storm-Petrel Hydrobates tethys | Tristram's Storm-Petrel Hydrobates tristrami | 1 | 0 | 1 |
| Wedge-rumped Storm-Petrel Hydrobates tethys | Short-tailed Hawk Buteo brachyurus | 1 | 0 | 1 |
| Least Storm-Petrel Hydrobates microsoma | Northern Fulmar Fulmarus glacialis | 1 | 0 | 1 |
| Northern Giant-Petrel Macronectes halli | Grey-faced Petrel Pterodroma gouldi | 1 | 0 | 1 |
| Northern Fulmar Fulmarus glacialis | Kermadec Petrel Pterodroma neglecta | 1 | 0 | 1 |
| Grey-faced Petrel Pterodroma gouldi | Kermadec Petrel Pterodroma neglecta | 1 | 0 | 1 |
| Murphy's Petrel Pterodroma ultima | Mottled Petrel Pterodroma inexpectata | 1 | 1 | 0 |
| Providence Petrel Pterodroma solandri | Juan Fernandez Petrel Pterodroma externa | 1 | 0 | 1 |
| Hawaiian Petrel Pterodroma sandwichensis | Cook's Petrel Pterodroma cookii | 1 | 1 | 0 |
| Hawaiian Petrel Pterodroma sandwichensis | Bulwer's Petrel Bulweria bulwerii | 1 | 1 | 0 |
| Hawaiian Petrel Pterodroma sandwichensis | White-chinned Petrel Procellaria aequinoctialis | 1 | 1 | 0 |
| Hawaiian Petrel Pterodroma sandwichensis | Red-footed Booby Sula sula | 1 | 1 | 0 |
| Hawaiian Petrel Pterodroma sandwichensis | Great White Egret Ardea alba | 1 | 1 | 0 |
| Flesh-footed Shearwater Ardenna carneipes | Buller's Shearwater Ardenna bulleri | 1 | 0 | 1 |
| Flesh-footed Shearwater Ardenna carneipes | Black-vented Shearwater Puffinus opisthomelas | 1 | 0 | 1 |
| Flesh-footed Shearwater Ardenna carneipes | Barn Swallow Hirundo rustica | 1 | 0 | 1 |
| Great Shearwater Ardenna gravis | Manx Shearwater Puffinus puffinus | 1 | 0 | 1 |
| Wedge-tailed Shearwater Ardenna pacifica | Buller's Shearwater Ardenna bulleri | 1 | 0 | 1 |
| Wedge-tailed Shearwater Ardenna pacifica | Short-tailed Shearwater Ardenna tenuirostris | 1 | 0 | 1 |
| Wedge-tailed Shearwater Ardenna pacifica | Western Wood-Pewee Contopus sordidulus | 1 | 0 | 1 |
| Buller's Shearwater Ardenna bulleri | Manx Shearwater Puffinus puffinus | 1 | 1 | 0 |
| Short-tailed Shearwater Ardenna tenuirostris | Newell's Shearwater Puffinus newelli | 1 | 0 | 1 |
| Short-tailed Shearwater Ardenna tenuirostris | Cory's Shearwater Calonectris borealis | 1 | 0 | 1 |
| Manx Shearwater Puffinus puffinus | Red-throated Pipit Anthus cervinus | 1 | 1 | 0 |
| Newell's Shearwater Puffinus newelli | Black-vented Shearwater Puffinus opisthomelas | 1 | 0 | 1 |
| Magnificent Frigatebird Fregata magnificens | Crested Oropendola Psarocolius decumanus | 1 | 0 | 1 |
| Northern Gannet Morus bassanus | Red-footed Booby Sula sula | 1 | 0 | 1 |
| Brown Booby Sula leucogaster | Masked Booby Sula dactylatra | 1 | 1 | 0 |
| Brown Booby Sula leucogaster | Pelagic Cormorant Urile pelagicus | 1 | 1 | 0 |
| Anhinga Anhinga anhinga | Double-crested Cormorant Nannopterum auritum | 1 | 1 | 0 |
| Anhinga Anhinga anhinga | Sagebrush Sparrow Artemisiospiza nevadensis | 1 | 1 | 0 |
| Brandt's Cormorant Urile penicillatus | Pelagic Cormorant Urile pelagicus | 1 | 0 | 1 |
| Pelagic Cormorant Urile pelagicus | Double-crested Cormorant Nannopterum auritum | 1 | 0 | 1 |
| Pelagic Cormorant Urile pelagicus | Neotropic Cormorant Nannopterum brasilianum | 1 | 1 | 0 |
| American Bittern Botaurus lentiginosus | Least Bittern Botaurus exilis | 1 | 0 | 1 |
| American Bittern Botaurus lentiginosus | Yellow-crowned Night Heron Nyctanassa violacea | 1 | 1 | 0 |
| Yellow-crowned Night Heron Nyctanassa violacea | Rustic Bunting Emberiza rustica | 1 | 0 | 1 |
| Black-crowned Night Heron Nycticorax nycticorax | Tricoloured Heron Egretta tricolor | 1 | 0 | 1 |
| Black-crowned Night Heron Nycticorax nycticorax | Green Heron Butorides virescens | 1 | 1 | 0 |
| Green Heron Butorides virescens | Green Kingfisher Chloroceryle americana | 1 | 0 | 1 |
| Great White Egret Ardea alba | Great Blue Heron Ardea herodias | 1 | 0 | 1 |
| White Ibis Eudocimus albus | Glossy Ibis Plegadis falcinellus | 1 | 1 | 0 |
| Glossy Ibis Plegadis falcinellus | White-faced Ibis Plegadis chihi | 1 | 0 | 1 |
| Glossy Ibis Plegadis falcinellus | Roseate Spoonbill Platalea ajaja | 1 | 0 | 1 |
| California Condor Gymnogyps californianus | American Black Vulture Coragyps atratus | 1 | 0 | 1 |
| American Black Vulture Coragyps atratus | Turkey Vulture Cathartes aura | 1 | 0 | 1 |
| Turkey Vulture Cathartes aura | Common Raven Corvus corax | 1 | 1 | 0 |
| Osprey Pandion haliaetus | Swallow-tailed Kite Elanoides forficatus | 1 | 1 | 0 |
| Pearl Kite Gampsonyx swainsonii | Mississippi Kite Ictinia mississippiensis | 1 | 1 | 0 |
| Swallow-tailed Kite Elanoides forficatus | Golden Eagle Aquila chrysaetos | 1 | 1 | 0 |
| Golden Eagle Aquila chrysaetos | White-tailed Eagle Haliaeetus albicilla | 1 | 0 | 1 |
| Golden Eagle Aquila chrysaetos | White-tailed Hawk Geranoaetus albicaudatus | 1 | 1 | 0 |
| Mississippi Kite Ictinia mississippiensis | Northern Harrier Circus hudsonius | 1 | 1 | 0 |
| Mississippi Kite Ictinia mississippiensis | American Crow Corvus brachyrhynchos | 1 | 0 | 1 |
| Northern Harrier Circus hudsonius | Broad-winged Hawk Buteo platypterus | 1 | 0 | 1 |
| Sharp-shinned Hawk Accipiter striatus | Cooper's Hawk Astur cooperii | 1 | 0 | 1 |
| Sharp-shinned Hawk Accipiter striatus | Harris's Hawk Parabuteo unicinctus | 1 | 1 | 0 |
| Cooper's Hawk Astur cooperii | American Goshawk Astur atricapillus | 1 | 1 | 0 |
| Cooper's Hawk Astur cooperii | Red-shouldered Hawk Buteo lineatus | 1 | 1 | 0 |
| White-tailed Eagle Haliaeetus albicilla | Bald Eagle Haliaeetus leucocephalus | 1 | 1 | 0 |
| White-tailed Eagle Haliaeetus albicilla | Ferruginous Hawk Buteo regalis | 1 | 1 | 0 |
| Common Black Hawk Buteogallus anthracinus | Savanna Hawk Buteogallus meridionalis | 1 | 1 | 0 |
| Common Black Hawk Buteogallus anthracinus | Zone-tailed Hawk Buteo albonotatus | 1 | 0 | 1 |
| White-tailed Hawk Geranoaetus albicaudatus | Grey Hawk Buteo plagiatus | 1 | 1 | 0 |
| White-tailed Hawk Geranoaetus albicaudatus | Great Horned Owl Bubo virginianus | 1 | 0 | 1 |
| Broad-winged Hawk Buteo platypterus | Short-tailed Hawk Buteo brachyurus | 1 | 0 | 1 |
| Broad-winged Hawk Buteo platypterus | Red-tailed Hawk Buteo jamaicensis | 1 | 0 | 1 |
| Swainson's Hawk Buteo swainsoni | Zone-tailed Hawk Buteo albonotatus | 1 | 0 | 1 |
| Swainson's Hawk Buteo swainsoni | Rough-legged Buzzard Buteo lagopus | 1 | 1 | 0 |
| Red-tailed Hawk Buteo jamaicensis | Ferruginous Hawk Buteo regalis | 1 | 0 | 1 |
| American Barn Owl Tyto furcata | Barn Swallow Hirundo rustica | 1 | 1 | 0 |
| Flammulated Owl Psiloscops flammeolus | Western Screech-Owl Megascops kennicottii | 1 | 1 | 0 |
| Flammulated Owl Psiloscops flammeolus | Elf Owl Micrathene whitneyi | 1 | 0 | 1 |
| Whiskered Screech-Owl Megascops trichopsis | Western Screech-Owl Megascops kennicottii | 1 | 0 | 1 |
| Eastern Screech-Owl Megascops asio | Elf Owl Micrathene whitneyi | 1 | 1 | 0 |
| Northern Pygmy-Owl Glaucidium gnoma | Tengmalm's Owl Aegolius funereus | 1 | 0 | 1 |
| Burrowing Owl Athene cunicularia | Spotted Owl Strix occidentalis | 1 | 0 | 1 |
| Barred Owl Strix varia | Great Grey Owl Strix nebulosa | 1 | 0 | 1 |
| Barred Owl Strix varia | Short-eared Owl Asio flammeus | 1 | 0 | 1 |
| Barred Owl Strix varia | Black-throated Sparrow Amphispiza bilineata | 1 | 0 | 1 |
| Long-eared Owl Asio otus | Northern Saw-whet Owl Aegolius acadicus | 1 | 1 | 0 |
| Short-eared Owl Asio flammeus | Tengmalm's Owl Aegolius funereus | 1 | 0 | 1 |
| Short-eared Owl Asio flammeus | Northern Saw-whet Owl Aegolius acadicus | 1 | 0 | 1 |
| Eared Quetzal Euptilotis neoxenus | Ringed Kingfisher Megaceryle torquata | 1 | 1 | 0 |
| Yellow-bellied Sapsucker Sphyrapicus varius | Red-breasted Sapsucker Sphyrapicus ruber | 1 | 1 | 0 |
| Red-breasted Sapsucker Sphyrapicus ruber | Vermilion Flycatcher Pyrocephalus rubinus | 1 | 0 | 1 |
| Lewis's Woodpecker Melanerpes lewis | Eastern Kingbird Tyrannus tyrannus | 1 | 0 | 1 |
| Acorn Woodpecker Melanerpes formicivorus | Golden-fronted Woodpecker Melanerpes aurifrons | 1 | 0 | 1 |
| Acorn Woodpecker Melanerpes formicivorus | Red-bellied Woodpecker Melanerpes carolinus | 1 | 1 | 0 |
| Gila Woodpecker Melanerpes uropygialis | Varied Bunting Passerina versicolor | 1 | 0 | 1 |
| Golden-fronted Woodpecker Melanerpes aurifrons | Black-backed Woodpecker Picoides arcticus | 1 | 1 | 0 |
| Black-backed Woodpecker Picoides arcticus | Downy Woodpecker Dryobates pubescens | 1 | 0 | 1 |
| Downy Woodpecker Dryobates pubescens | Nuttall's Woodpecker Dryobates nuttallii | 1 | 0 | 1 |
| Nuttall's Woodpecker Dryobates nuttallii | Ladder-backed Woodpecker Dryobates scalaris | 1 | 1 | 0 |
| Nuttall's Woodpecker Dryobates nuttallii | Hairy Woodpecker Leuconotopicus villosus | 1 | 1 | 0 |
| Ladder-backed Woodpecker Dryobates scalaris | Hairy Woodpecker Leuconotopicus villosus | 1 | 0 | 1 |
| Hairy Woodpecker Leuconotopicus villosus | American Kestrel Falco sparverius | 1 | 0 | 1 |
| Gilded Flicker Colaptes chrysoides | American Kestrel Falco sparverius | 1 | 1 | 0 |
| Gilded Flicker Colaptes chrysoides | Pacific Wren Troglodytes pacificus | 1 | 0 | 1 |
| Common Kestrel Falco tinnunculus | Merlin Falco columbarius | 1 | 0 | 1 |
| Common Kestrel Falco tinnunculus | Wood Thrush Hylocichla mustelina | 1 | 0 | 1 |
| Merlin Falco columbarius | Aplomado Falcon Falco femoralis | 1 | 0 | 1 |
| Aplomado Falcon Falco femoralis | Prairie Falcon Falco mexicanus | 1 | 1 | 0 |
| Lanner Falcon Falco biarmicus | Prairie Falcon Falco mexicanus | 1 | 1 | 0 |
| Prairie Falcon Falco mexicanus | Olive-sided Flycatcher Contopus cooperi | 1 | 1 | 0 |
| Bourke's Parrot Neopsephotus bourkii | Red-rumped Parrot Psephotus haematonotus | 1 | 1 | 0 |
| Bourke's Parrot Neopsephotus bourkii | Red-billed Firefinch Lagonosticta senegala | 1 | 0 | 1 |
| Budgerigar Melopsittacus undulatus | Thick-billed Parrot Rhynchopsitta pachyrhyncha | 1 | 1 | 0 |
| Rainbow Lorikeet Trichoglossus moluccanus | Yellow-collared Lovebird Agapornis personatus | 1 | 0 | 1 |
| Yellow-headed Amazon Amazona oratrix | Sun Parakeet Aratinga solstitialis | 1 | 1 | 0 |
| Grey-collared Becard Pachyramphus major | Tufted Flycatcher Mitrephanes phaeocercus | 1 | 1 | 0 |
| Grey-collared Becard Pachyramphus major | Dusky-capped Flycatcher Myiarchus tuberculifer | 1 | 0 | 1 |
| Northern Beardless-Tyrannulet Camptostoma imberbe | Greater Pewee Contopus pertinax | 1 | 0 | 1 |
| Olive-sided Flycatcher Contopus cooperi | Greater Pewee Contopus pertinax | 1 | 0 | 1 |
| Olive-sided Flycatcher Contopus cooperi | Abert's Towhee Melozone aberti | 1 | 0 | 1 |
| Western Wood-Pewee Contopus sordidulus | Eastern Wood-Pewee Contopus virens | 1 | 0 | 1 |
| Western Wood-Pewee Contopus sordidulus | Acadian Flycatcher Empidonax virescens | 1 | 1 | 0 |
| Western Wood-Pewee Contopus sordidulus | Smith's Longspur Calcarius pictus | 1 | 0 | 1 |
| Eastern Wood-Pewee Contopus virens | Acadian Flycatcher Empidonax virescens | 1 | 0 | 1 |
| Yellow-bellied Flycatcher Empidonax flaviventris | Pacific Wren Troglodytes pacificus | 1 | 1 | 0 |
| Acadian Flycatcher Empidonax virescens | Alder Flycatcher Empidonax alnorum | 1 | 1 | 0 |
| Acadian Flycatcher Empidonax virescens | Willow Flycatcher Empidonax traillii | 1 | 1 | 0 |
| Alder Flycatcher Empidonax alnorum | Western Flycatcher Empidonax difficilis | 1 | 1 | 0 |
| Willow Flycatcher Empidonax traillii | Hammond's Flycatcher Empidonax hammondii | 1 | 1 | 0 |
| Willow Flycatcher Empidonax traillii | Western Flycatcher Empidonax difficilis | 1 | 1 | 0 |
| Hammond's Flycatcher Empidonax hammondii | Dusky Flycatcher Empidonax oberholseri | 1 | 0 | 1 |
| Grey Flycatcher Empidonax wrightii | Dusky Flycatcher Empidonax oberholseri | 1 | 1 | 0 |
| Grey Flycatcher Empidonax wrightii | Chestnut-backed Chickadee Poecile rufescens | 1 | 0 | 1 |
| Grey Flycatcher Empidonax wrightii | Brown-chested Martin Progne tapera | 1 | 0 | 1 |
| Grey Flycatcher Empidonax wrightii | Bushtit Psaltriparus minimus | 1 | 1 | 0 |
| Dusky Flycatcher Empidonax oberholseri | Pine Flycatcher Empidonax affinis | 1 | 0 | 1 |
| Dusky Flycatcher Empidonax oberholseri | Brown-chested Martin Progne tapera | 1 | 0 | 1 |
| Pine Flycatcher Empidonax affinis | Western Flycatcher Empidonax difficilis | 1 | 1 | 0 |
| Western Flycatcher Empidonax difficilis | Buff-breasted Flycatcher Empidonax fulvifrons | 1 | 1 | 0 |
| Western Flycatcher Empidonax difficilis | Eastern Phoebe Sayornis phoebe | 1 | 0 | 1 |
| Western Flycatcher Empidonax difficilis | Say's Phoebe Sayornis saya | 1 | 1 | 0 |
| Western Flycatcher Empidonax difficilis | Red-eyed Vireo Vireo olivaceus | 1 | 0 | 1 |
| Eastern Phoebe Sayornis phoebe | Say's Phoebe Sayornis saya | 1 | 0 | 1 |
| Eastern Phoebe Sayornis phoebe | Marsh Wren Cistothorus palustris | 1 | 1 | 0 |
| Eastern Phoebe Sayornis phoebe | Dickcissel Spiza americana | 1 | 0 | 1 |
| Vermilion Flycatcher Pyrocephalus rubinus | Ash-throated Flycatcher Myiarchus cinerascens | 1 | 1 | 0 |
| Ash-throated Flycatcher Myiarchus cinerascens | Great Crested Flycatcher Myiarchus crinitus | 1 | 0 | 1 |
| Ash-throated Flycatcher Myiarchus cinerascens | Northern Shrike Lanius borealis | 1 | 1 | 0 |
| Ash-throated Flycatcher Myiarchus cinerascens | Chestnut-sided Warbler Setophaga pensylvanica | 1 | 0 | 1 |
| Great Crested Flycatcher Myiarchus crinitus | Great Kiskadee Pitangus sulphuratus | 1 | 1 | 0 |
| Great Crested Flycatcher Myiarchus crinitus | Painted Bunting Passerina ciris | 1 | 0 | 1 |
| Great Kiskadee Pitangus sulphuratus | Western Kingbird Tyrannus verticalis | 1 | 1 | 0 |
| Sulphur-bellied Flycatcher Myiodynastes luteiventris | Piratic Flycatcher Legatus leucophaius | 1 | 1 | 0 |
| Tropical Kingbird Tyrannus melancholicus | Western Kingbird Tyrannus verticalis | 1 | 1 | 0 |
| Couch's Kingbird Tyrannus couchii | Cassin's Kingbird Tyrannus vociferans | 1 | 0 | 1 |
| Couch's Kingbird Tyrannus couchii | Western Kingbird Tyrannus verticalis | 1 | 0 | 1 |
| Eastern Kingbird Tyrannus tyrannus | Yellow-throated Vireo Vireo flavifrons | 1 | 0 | 1 |
| Scissor-tailed Flycatcher Tyrannus forficatus | Fork-tailed Flycatcher Tyrannus savana | 1 | 1 | 0 |
| Black-capped Vireo Vireo atricapilla | Grey Vireo Vireo vicinior | 1 | 1 | 0 |
| Black-capped Vireo Vireo atricapilla | Philadelphia Vireo Vireo philadelphicus | 1 | 1 | 0 |
| White-eyed Vireo Vireo griseus | Hutton's Vireo Vireo huttoni | 1 | 1 | 0 |
| Chilean Tinamou Nothoprocta perdicaria | Dusky Warbler Phylloscopus fuscatus | 1 | 0 | 1 |
| Bell's Vireo Vireo bellii | Snow Bunting Plectrophenax nivalis | 1 | 1 | 0 |
| Hutton's Vireo Vireo huttoni | Yellow-throated Vireo Vireo flavifrons | 1 | 1 | 0 |
| Hutton's Vireo Vireo huttoni | Cassin's Vireo Vireo cassinii | 1 | 1 | 0 |
| Yellow-throated Vireo Vireo flavifrons | Philadelphia Vireo Vireo philadelphicus | 1 | 0 | 1 |
| Yellow-throated Vireo Vireo flavifrons | Common Yellowthroat Geothlypis trichas | 1 | 0 | 1 |
| Cassin's Vireo Vireo cassinii | Plumbeous Vireo Vireo plumbeus | 1 | 1 | 0 |
| Blue-headed Vireo Vireo solitarius | Warbling Vireo Vireo gilvus | 1 | 1 | 0 |
| Blue-headed Vireo Vireo solitarius | Red-flanked Bluetail Tarsiger cyanurus | 1 | 0 | 1 |
| Plumbeous Vireo Vireo plumbeus | Warbling Vireo Vireo gilvus | 1 | 0 | 1 |
| Philadelphia Vireo Vireo philadelphicus | Golden-crowned Sparrow Zonotrichia atricapilla | 1 | 1 | 0 |
| Red-eyed Vireo Vireo olivaceus | Yellow-green Vireo Vireo flavoviridis | 1 | 0 | 1 |
| Loggerhead Shrike Lanius ludovicianus | Clark's Nutcracker Nucifraga columbiana | 1 | 1 | 0 |
| Northern Shrike Lanius borealis | Clark's Nutcracker Nucifraga columbiana | 1 | 1 | 0 |
| Canada Jay Perisoreus canadensis | Pinyon Jay Gymnorhinus cyanocephalus | 1 | 1 | 0 |
| Canada Jay Perisoreus canadensis | Eurasian Blue Tit Cyanistes caeruleus | 1 | 0 | 1 |
| Canada Jay Perisoreus canadensis | Brewer's Sparrow Spizella breweri | 1 | 1 | 0 |
| Pinyon Jay Gymnorhinus cyanocephalus | Mexican Jay Aphelocoma wollweberi | 1 | 0 | 1 |
| Blue Jay Cyanocitta cristata | Mexican Jay Aphelocoma wollweberi | 1 | 1 | 0 |
| Blue Jay Cyanocitta cristata | Lapland Bunting Calcarius lapponicus | 1 | 1 | 0 |
| Blue Jay Cyanocitta cristata | Dark-eyed Junco Junco hyemalis | 1 | 1 | 0 |
| Island Scrub-Jay Aphelocoma insularis | California Scrub-Jay Aphelocoma californica | 1 | 1 | 0 |
| California Scrub-Jay Aphelocoma californica | Woodhouse's Scrub-Jay Aphelocoma woodhouseii | 1 | 0 | 1 |
| Black-billed Magpie Pica hudsonia | Yellow-billed Magpie Pica nuttalli | 1 | 1 | 0 |
| American Crow Corvus brachyrhynchos | Chihuahuan Raven Corvus cryptoleucus | 1 | 0 | 1 |
| American Crow Corvus brachyrhynchos | Common Raven Corvus corax | 1 | 1 | 0 |
| American Crow Corvus brachyrhynchos | Shore Lark Eremophila alpestris | 1 | 1 | 0 |
| American Crow Corvus brachyrhynchos | Lapland Bunting Calcarius lapponicus | 1 | 1 | 0 |
| American Crow Corvus brachyrhynchos | Redpoll Acanthis flammea | 1 | 0 | 1 |
| Chihuahuan Raven Corvus cryptoleucus | Common Raven Corvus corax | 1 | 1 | 0 |
| Mountain Chickadee Poecile gambeli | Field Sparrow Spizella pusilla | 1 | 1 | 0 |
| Mexican Chickadee Poecile sclateri | White-breasted Nuthatch Sitta carolinensis | 1 | 1 | 0 |
| Bridled Titmouse Baeolophus wollweberi | Black-crested Titmouse Baeolophus atricristatus | 1 | 1 | 0 |
| Bridled Titmouse Baeolophus wollweberi | Nashville Warbler Leiothlypis ruficapilla | 1 | 0 | 1 |
| Oak Titmouse Baeolophus inornatus | Juniper Titmouse Baeolophus ridgwayi | 1 | 0 | 1 |
| Juniper Titmouse Baeolophus ridgwayi | Black-crested Titmouse Baeolophus atricristatus | 1 | 0 | 1 |
| Juniper Titmouse Baeolophus ridgwayi | Bushtit Psaltriparus minimus | 1 | 1 | 0 |
| Juniper Titmouse Baeolophus ridgwayi | Redwing Turdus iliacus | 1 | 0 | 1 |
| Black-crested Titmouse Baeolophus atricristatus | Carolina Wren Thryothorus ludovicianus | 1 | 0 | 1 |
| Verdin Auriparus flaviceps | Lanceolated Warbler Locustella lanceolata | 1 | 0 | 1 |
| Verdin Auriparus flaviceps | Pacific Wren Troglodytes pacificus | 1 | 1 | 0 |
| Shore Lark Eremophila alpestris | Eurasian Skylark Alauda arvensis | 1 | 1 | 0 |
| Shore Lark Eremophila alpestris | Lapland Bunting Calcarius lapponicus | 1 | 0 | 1 |
| Shore Lark Eremophila alpestris | Brewer's Blackbird Euphagus cyanocephalus | 1 | 0 | 1 |
| Shore Lark Eremophila alpestris | Common Grackle Quiscalus quiscula | 1 | 1 | 0 |
| Eurasian Skylark Alauda arvensis | Lanceolated Warbler Locustella lanceolata | 1 | 1 | 0 |
| Lanceolated Warbler Locustella lanceolata | Black-chinned Sparrow Spizella atrogularis | 1 | 1 | 0 |
| Lanceolated Warbler Locustella lanceolata | Virginia's Warbler Leiothlypis virginiae | 1 | 1 | 0 |
| Sand Martin Riparia riparia | Violet-green Swallow Tachycineta thalassina | 1 | 0 | 1 |
| Sand Martin Riparia riparia | Brown-chested Martin Progne tapera | 1 | 0 | 1 |
| Tree Swallow Tachycineta bicolor | Purple Martin Progne subis | 1 | 1 | 0 |
| Tree Swallow Tachycineta bicolor | Barn Swallow Hirundo rustica | 1 | 1 | 0 |
| Tree Swallow Tachycineta bicolor | Lapland Bunting Calcarius lapponicus | 1 | 0 | 1 |
| Tree Swallow Tachycineta bicolor | Western Meadowlark Sturnella neglecta | 1 | 0 | 1 |
| Tree Swallow Tachycineta bicolor | Brown-headed Cowbird Molothrus ater | 1 | 0 | 1 |
| Violet-green Swallow Tachycineta thalassina | Northern Rough-winged Swallow Stelgidopteryx serripennis | 1 | 1 | 0 |
| Purple Martin Progne subis | Cave Swallow Petrochelidon fulva | 1 | 1 | 0 |
| Purple Martin Progne subis | American Robin Turdus migratorius | 1 | 0 | 1 |
| Purple Martin Progne subis | Black-throated Green Warbler Setophaga virens | 1 | 1 | 0 |
| Brown-chested Martin Progne tapera | Purple Finch Haemorhous purpureus | 1 | 0 | 1 |
| Barn Swallow Hirundo rustica | Lapland Bunting Calcarius lapponicus | 1 | 0 | 1 |
| Barn Swallow Hirundo rustica | Red-winged Blackbird Agelaius phoeniceus | 1 | 1 | 0 |
| Cliff Swallow Petrochelidon pyrrhonota | Cave Swallow Petrochelidon fulva | 1 | 0 | 1 |
| Cliff Swallow Petrochelidon pyrrhonota | Dark-eyed Junco Junco hyemalis | 1 | 1 | 0 |
| Cliff Swallow Petrochelidon pyrrhonota | Brewer's Blackbird Euphagus cyanocephalus | 1 | 0 | 1 |
| Cliff Swallow Petrochelidon pyrrhonota | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| Cave Swallow Petrochelidon fulva | Bobolink Dolichonyx oryzivorus | 1 | 1 | 0 |
| Yellow-browed Warbler Phylloscopus inornatus | Blue-winged Warbler Vermivora cyanoptera | 1 | 0 | 1 |
| Dusky Warbler Phylloscopus fuscatus | Wrentit Chamaea fasciata | 1 | 1 | 0 |
| Arctic Warbler Phylloscopus borealis | Bushtit Psaltriparus minimus | 1 | 1 | 0 |
| Arctic Warbler Phylloscopus borealis | Wrentit Chamaea fasciata | 1 | 1 | 0 |
| Wrentit Chamaea fasciata | Lucy's Warbler Leiothlypis luciae | 1 | 0 | 1 |
| Wrentit Chamaea fasciata | Grace's Warbler Setophaga graciae | 1 | 0 | 1 |
| Golden-crowned Kinglet Regulus satrapa | Pygmy Nuthatch Sitta pygmaea | 1 | 0 | 1 |
| Golden-crowned Kinglet Regulus satrapa | Hermit Thrush Catharus guttatus | 1 | 1 | 0 |
| Red-breasted Nuthatch Sitta canadensis | Brown Creeper Certhia americana | 1 | 1 | 0 |
| Brown Creeper Certhia americana | California Gnatcatcher Polioptila californica | 1 | 1 | 0 |
| Blue-grey Gnatcatcher Polioptila caerulea | Rock Wren Salpinctes obsoletus | 1 | 1 | 0 |
| Black-tailed Gnatcatcher Polioptila melanura | California Gnatcatcher Polioptila californica | 1 | 0 | 1 |
| Black-tailed Gnatcatcher Polioptila melanura | Brown-headed Cowbird Molothrus ater | 1 | 0 | 1 |
| Rock Wren Salpinctes obsoletus | Canyon Wren Catherpes mexicanus | 1 | 1 | 0 |
| Rock Wren Salpinctes obsoletus | Townsend's Solitaire Myadestes townsendi | 1 | 0 | 1 |
| Northern House Wren Troglodytes aedon | Sinaloa Wren Thryophilus sinaloa | 1 | 0 | 1 |
| Winter Wren Troglodytes hiemalis | Sedge Wren Cistothorus stellaris | 1 | 1 | 0 |
| Marsh Wren Cistothorus palustris | Henslow's Sparrow Centronyx henslowii | 1 | 0 | 1 |
| Carolina Wren Thryothorus ludovicianus | Bewick's Wren Thryomanes bewickii | 1 | 1 | 0 |
| Carolina Wren Thryothorus ludovicianus | Townsend's Solitaire Myadestes townsendi | 1 | 0 | 1 |
| Carolina Wren Thryothorus ludovicianus | Yellow-rumped Warbler Setophaga coronata | 1 | 0 | 1 |
| Cactus Wren Campylorhynchus brunneicapillus | Brahminy Starling Sturnia pagodarum | 1 | 0 | 1 |
| Curve-billed Thrasher Toxostoma curvirostre | Long-billed Thrasher Toxostoma longirostre | 1 | 0 | 1 |
| Curve-billed Thrasher Toxostoma curvirostre | California Thrasher Toxostoma redivivum | 1 | 0 | 1 |
| Brown Thrasher Toxostoma rufum | Long-billed Thrasher Toxostoma longirostre | 1 | 0 | 1 |
| Bendire's Thrasher Toxostoma bendirei | LeConte's Thrasher Toxostoma lecontei | 1 | 0 | 1 |
| LeConte's Thrasher Toxostoma lecontei | Crissal Thrasher Toxostoma crissale | 1 | 1 | 0 |
| Crissal Thrasher Toxostoma crissale | Sage Thrasher Oreoscoptes montanus | 1 | 1 | 0 |
| Eastern Bluebird Sialia sialis | Western Bluebird Sialia mexicana | 1 | 1 | 0 |
| Eastern Bluebird Sialia sialis | Mountain Bluebird Sialia currucoides | 1 | 0 | 1 |
| Eastern Bluebird Sialia sialis | Lark Bunting Calamospiza melanocorys | 1 | 1 | 0 |
| Townsend's Solitaire Myadestes townsendi | Brown-backed Solitaire Myadestes occidentalis | 1 | 1 | 0 |
| Townsend's Solitaire Myadestes townsendi | Northern Parula Setophaga americana | 1 | 0 | 1 |
| Orange-billed Nightingale-Thrush Catharus aurantiirostris | Swainson's Thrush Catharus ustulatus | 1 | 1 | 0 |
| Orange-billed Nightingale-Thrush Catharus aurantiirostris | Rufous-backed Robin Turdus rufopalliatus | 1 | 0 | 1 |
| Veery Catharus fuscescens | Swainson's Thrush Catharus ustulatus | 1 | 1 | 0 |
| Grey-cheeked Thrush Catharus minimus | Swainson's Thrush Catharus ustulatus | 1 | 0 | 1 |
| Grey-cheeked Thrush Catharus minimus | Hermit Thrush Catharus guttatus | 1 | 1 | 0 |
| Grey-cheeked Thrush Catharus minimus | Wood Thrush Hylocichla mustelina | 1 | 1 | 0 |
| Grey-cheeked Thrush Catharus minimus | Botteri's Sparrow Peucaea botterii | 1 | 1 | 0 |
| Grey-cheeked Thrush Catharus minimus | Virginia's Warbler Leiothlypis virginiae | 1 | 1 | 0 |
| Hermit Thrush Catharus guttatus | White-throated Thrush Turdus assimilis | 1 | 1 | 0 |
| Wood Thrush Hylocichla mustelina | Fieldfare Turdus pilaris | 1 | 0 | 1 |
| Aztec Thrush Ridgwayia pinicola | White-throated Thrush Turdus assimilis | 1 | 0 | 1 |
| Aztec Thrush Ridgwayia pinicola | Abert's Towhee Melozone aberti | 1 | 1 | 0 |
| Redwing Turdus iliacus | White-throated Thrush Turdus assimilis | 1 | 1 | 0 |
| Redwing Turdus iliacus | Clay-coloured Thrush Turdus grayi | 1 | 1 | 0 |
| Redwing Turdus iliacus | Fieldfare Turdus pilaris | 1 | 1 | 0 |
| White-throated Thrush Turdus assimilis | Brown-capped Rosy-Finch Leucosticte australis | 1 | 1 | 0 |
| White-throated Thrush Turdus assimilis | Varied Bunting Passerina versicolor | 1 | 0 | 1 |
| Clay-coloured Thrush Turdus grayi | Rufous-backed Robin Turdus rufopalliatus | 1 | 0 | 1 |
| American Robin Turdus migratorius | Eyebrowed Thrush Turdus obscurus | 1 | 0 | 1 |
| Dusky Thrush Turdus eunomus | Connecticut Warbler Oporornis agilis | 1 | 1 | 0 |
| Bluethroat Luscinia svecica | Red-flanked Bluetail Tarsiger cyanurus | 1 | 0 | 1 |
| Siberian Rubythroat Calliope calliope | Northern Wheatear Oenanthe oenanthe | 1 | 1 | 0 |
| Blue Rock Thrush Monticola solitarius | Bohemian Waxwing Bombycilla garrulus | 1 | 0 | 1 |
| Bohemian Waxwing Bombycilla garrulus | Grey Silky-flycatcher Ptiliogonys cinereus | 1 | 0 | 1 |
| Phainopepla Phainopepla nitens | Worm-eating Warbler Helmitheros vermivorum | 1 | 1 | 0 |
| Olive Warbler Peucedramus taeniatus | Virginia's Warbler Leiothlypis virginiae | 1 | 1 | 0 |
| Vitelline Masked-Weaver Ploceus vitellinus | Southern Red Bishop Euplectes orix | 1 | 1 | 0 |
| Southern Red Bishop Euplectes orix | Zanzibar Red Bishop Euplectes nigroventris | 1 | 1 | 0 |
| Zanzibar Red Bishop Euplectes nigroventris | Black-winged Bishop Euplectes hordeaceus | 1 | 0 | 1 |
| Bronze Mannikin Spermestes cucullata | Black-and-white Mannikin Spermestes bicolor | 1 | 1 | 0 |
| Black-and-white Mannikin Spermestes bicolor | White-rumped Munia Lonchura striata | 1 | 0 | 1 |
| Black-and-white Mannikin Spermestes bicolor | Sagebrush Sparrow Artemisiospiza nevadensis | 1 | 1 | 0 |
| Gouldian Finch Chloebia gouldiae | Parrot-billed Seedeater Sporophila peruviana | 1 | 1 | 0 |
| Black-rumped Waxbill Estrilda troglodytes | Crimson-rumped Waxbill Estrilda rhodopyga | 1 | 0 | 1 |
| Zebra Waxbill Amandava subflava | Parrot-billed Seedeater Sporophila peruviana | 1 | 0 | 1 |
| Blue-capped Cordonbleu Uraeginthus cyanocephalus | Red-throated Twinspot Hypargos niveoguttatus | 1 | 0 | 1 |
| Buff-bellied Pipit Anthus rubescens | Savannah Sparrow Passerculus sandwichensis | 1 | 0 | 1 |
| Buff-bellied Pipit Anthus rubescens | Hooded Oriole Icterus cucullatus | 1 | 1 | 0 |
| Buff-bellied Pipit Anthus rubescens | Cerulean Warbler Setophaga cerulea | 1 | 0 | 1 |
| Evening Grosbeak Hesperiphona vespertina | Pine Grosbeak Pinicola enucleator | 1 | 1 | 0 |
| Evening Grosbeak Hesperiphona vespertina | Oriental Greenfinch Chloris sinica | 1 | 0 | 1 |
| Hawfinch Coccothraustes coccothraustes | Black Rosy-Finch Leucosticte atrata | 1 | 1 | 0 |
| Common Rosefinch Carpodacus erythrinus | Pine Grosbeak Pinicola enucleator | 1 | 0 | 1 |
| Common Rosefinch Carpodacus erythrinus | House Finch Haemorhous mexicanus | 1 | 0 | 1 |
| Pine Grosbeak Pinicola enucleator | Common Crossbill Loxia curvirostra | 1 | 1 | 0 |
| Pine Grosbeak Pinicola enucleator | Two-barred Crossbill Loxia leucoptera | 1 | 1 | 0 |
| Pine Grosbeak Pinicola enucleator | Flame-coloured Tanager Piranga bidentata | 1 | 0 | 1 |
| Grey-crowned Rosy-Finch Leucosticte tephrocotis | Black Rosy-Finch Leucosticte atrata | 1 | 0 | 1 |
| Grey-crowned Rosy-Finch Leucosticte tephrocotis | Pine Siskin Spinus pinus | 1 | 1 | 0 |
| Grey-crowned Rosy-Finch Leucosticte tephrocotis | Black-and-white Warbler Mniotilta varia | 1 | 0 | 1 |
| Black Rosy-Finch Leucosticte atrata | Brown-capped Rosy-Finch Leucosticte australis | 1 | 0 | 1 |
| House Finch Haemorhous mexicanus | Lawrence's Goldfinch Spinus lawrencei | 1 | 1 | 0 |
| Purple Finch Haemorhous purpureus | Yellow-throated Warbler Setophaga dominica | 1 | 1 | 0 |
| Purple Finch Haemorhous purpureus | Varied Bunting Passerina versicolor | 1 | 1 | 0 |
| Cassin's Finch Haemorhous cassinii | Oriental Greenfinch Chloris sinica | 1 | 1 | 0 |
| Cassin's Finch Haemorhous cassinii | Black-throated Canary Crithagra atrogularis | 1 | 1 | 0 |
| Cassin's Finch Haemorhous cassinii | Pine Siskin Spinus pinus | 1 | 0 | 1 |
| Cassin's Finch Haemorhous cassinii | Lawrence's Goldfinch Spinus lawrencei | 1 | 1 | 0 |
| Oriental Greenfinch Chloris sinica | Cassia Crossbill Loxia sinesciuris | 1 | 1 | 0 |
| Oriental Greenfinch Chloris sinica | Lawrence's Goldfinch Spinus lawrencei | 1 | 1 | 0 |
| Black-throated Canary Crithagra atrogularis | Common Crossbill Loxia curvirostra | 1 | 1 | 0 |
| Common Crossbill Loxia curvirostra | Two-barred Crossbill Loxia leucoptera | 1 | 1 | 0 |
| European Serin Serinus serinus | Grey-crowned Goldfinch Carduelis caniceps | 1 | 1 | 0 |
| Pine Siskin Spinus pinus | Lawrence's Goldfinch Spinus lawrencei | 1 | 0 | 1 |
| Lesser Goldfinch Spinus psaltria | American Goldfinch Spinus tristis | 1 | 1 | 0 |
| Lesser Goldfinch Spinus psaltria | Chestnut-sided Warbler Setophaga pensylvanica | 1 | 1 | 0 |
| Lawrence's Goldfinch Spinus lawrencei | American Goldfinch Spinus tristis | 1 | 0 | 1 |
| Lawrence's Goldfinch Spinus lawrencei | Tricoloured Blackbird Agelaius tricolor | 1 | 1 | 0 |
| American Goldfinch Spinus tristis | White-crowned Sparrow Zonotrichia leucophrys | 1 | 1 | 0 |
| American Goldfinch Spinus tristis | Western Meadowlark Sturnella neglecta | 1 | 1 | 0 |
| American Goldfinch Spinus tristis | Red-winged Blackbird Agelaius phoeniceus | 1 | 0 | 1 |
| American Goldfinch Spinus tristis | Brown-headed Cowbird Molothrus ater | 1 | 0 | 1 |
| American Goldfinch Spinus tristis | Brewer's Blackbird Euphagus cyanocephalus | 1 | 1 | 0 |
| American Goldfinch Spinus tristis | Yellow-rumped Warbler Setophaga coronata | 1 | 0 | 1 |
| American Goldfinch Spinus tristis | Hepatic Tanager Piranga flava | 1 | 0 | 1 |
| Black Siskin Spinus atratus | Redpoll Acanthis flammea | 1 | 0 | 1 |
| Lapland Bunting Calcarius lapponicus | Brewer's Sparrow Spizella breweri | 1 | 0 | 1 |
| Lapland Bunting Calcarius lapponicus | Red-winged Blackbird Agelaius phoeniceus | 1 | 0 | 1 |
| Lapland Bunting Calcarius lapponicus | Brown-headed Cowbird Molothrus ater | 1 | 1 | 0 |
| Smith's Longspur Calcarius pictus | Rufous-crowned Sparrow Aimophila ruficeps | 1 | 1 | 0 |
| Thick-billed Longspur Rhynchophanes mccownii | Hepatic Tanager Piranga flava | 1 | 1 | 0 |
| Thick-billed Longspur Rhynchophanes mccownii | Blue-black Grassquit Volatinia jacarina | 1 | 0 | 1 |
| Rufous-winged Sparrow Peucaea carpalis | Rufous-crowned Sparrow Aimophila ruficeps | 1 | 0 | 1 |
| Botteri's Sparrow Peucaea botterii | Cassin's Sparrow Peucaea cassinii | 1 | 1 | 0 |
| Botteri's Sparrow Peucaea botterii | Grasshopper Sparrow Ammodramus savannarum | 1 | 1 | 0 |
| Cassin's Sparrow Peucaea cassinii | Grasshopper Sparrow Ammodramus savannarum | 1 | 1 | 0 |
| Cassin's Sparrow Peucaea cassinii | White-crowned Sparrow Zonotrichia leucophrys | 1 | 1 | 0 |
| Cassin's Sparrow Peucaea cassinii | Rufous-crowned Sparrow Aimophila ruficeps | 1 | 0 | 1 |
| Grasshopper Sparrow Ammodramus savannarum | Clay-coloured Sparrow Spizella pallida | 1 | 1 | 0 |
| Chipping Sparrow Spizella passerina | Black-headed Grosbeak Pheucticus melanocephalus | 1 | 0 | 1 |
| Clay-coloured Sparrow Spizella pallida | Lark Sparrow Chondestes grammacus | 1 | 1 | 0 |
| Field Sparrow Spizella pusilla | Brewer's Sparrow Spizella breweri | 1 | 0 | 1 |
| Field Sparrow Spizella pusilla | Grace's Warbler Setophaga graciae | 1 | 1 | 0 |
| Five-striped Sparrow Amphispizopsis quinquestriata | White-throated Sparrow Zonotrichia albicollis | 1 | 1 | 0 |
| Five-striped Sparrow Amphispizopsis quinquestriata | Siberian Pipit Anthus japonicus | 1 | 0 | 1 |
| Lark Bunting Calamospiza melanocorys | Fox Sparrow Passerella iliaca | 1 | 1 | 0 |
| American Tree Sparrow Spizelloides arborea | Fox Sparrow Passerella iliaca | 1 | 1 | 0 |
| Dark-eyed Junco Junco hyemalis | Red-winged Blackbird Agelaius phoeniceus | 1 | 0 | 1 |
| Dark-eyed Junco Junco hyemalis | Brown-headed Cowbird Molothrus ater | 1 | 0 | 1 |
| Dark-eyed Junco Junco hyemalis | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| White-crowned Sparrow Zonotrichia leucophrys | Redpoll Acanthis flammea | 1 | 0 | 1 |
| Golden-crowned Sparrow Zonotrichia atricapilla | White-throated Sparrow Zonotrichia albicollis | 1 | 0 | 1 |
| Harris's Sparrow Zonotrichia querula | Bell's Sparrow Artemisiospiza belli | 1 | 1 | 0 |
| Harris's Sparrow Zonotrichia querula | Kentucky Warbler Geothlypis formosa | 1 | 1 | 0 |
| Harris's Sparrow Zonotrichia querula | Redpoll Acanthis flammea | 1 | 1 | 0 |
| Vesper Sparrow Pooecetes gramineus | LeConte's Sparrow Ammospiza leconteii | 1 | 1 | 0 |
| Vesper Sparrow Pooecetes gramineus | Nelson's Sparrow Ammospiza nelsoni | 1 | 1 | 0 |
| Vesper Sparrow Pooecetes gramineus | Savannah Sparrow Passerculus sandwichensis | 1 | 1 | 0 |
| LeConte's Sparrow Ammospiza leconteii | Nelson's Sparrow Ammospiza nelsoni | 1 | 1 | 0 |
| Savannah Sparrow Passerculus sandwichensis | Baird's Sparrow Centronyx bairdii | 1 | 0 | 1 |
| Savannah Sparrow Passerculus sandwichensis | Henslow's Sparrow Centronyx henslowii | 1 | 0 | 1 |
| Baird's Sparrow Centronyx bairdii | Virginia's Warbler Leiothlypis virginiae | 1 | 1 | 0 |
| Henslow's Sparrow Centronyx henslowii | Lincoln's Sparrow Melospiza lincolnii | 1 | 1 | 0 |
| Lincoln's Sparrow Melospiza lincolnii | Ovenbird Seiurus aurocapilla | 1 | 0 | 1 |
| Canyon Towhee Melozone fusca | California Towhee Melozone crissalis | 1 | 1 | 0 |
| Canyon Towhee Melozone fusca | Virginia's Warbler Leiothlypis virginiae | 1 | 1 | 0 |
| Abert's Towhee Melozone aberti | California Towhee Melozone crissalis | 1 | 0 | 1 |
| Abert's Towhee Melozone aberti | Rufous-crowned Sparrow Aimophila ruficeps | 1 | 0 | 1 |
| Rufous-crowned Sparrow Aimophila ruficeps | Green-tailed Towhee Pipilo chlorurus | 1 | 0 | 1 |
| Spotted Towhee Pipilo maculatus | Eastern Towhee Pipilo erythrophthalmus | 1 | 0 | 1 |
| Yellow-headed Blackbird Xanthocephalus xanthocephalus | Lazuli Bunting Passerina amoena | 1 | 1 | 0 |
| Western Meadowlark Sturnella neglecta | Red-winged Blackbird Agelaius phoeniceus | 1 | 0 | 1 |
| Western Meadowlark Sturnella neglecta | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| Chihuahuan Meadowlark Sturnella lilianae | Black-vented Oriole Icterus wagleri | 1 | 0 | 1 |
| Chihuahuan Meadowlark Sturnella lilianae | Orchard Oriole Icterus spurius | 1 | 0 | 1 |
| Black-vented Oriole Icterus wagleri | Orchard Oriole Icterus spurius | 1 | 1 | 0 |
| Black-vented Oriole Icterus wagleri | Scott's Oriole Icterus parisorum | 1 | 1 | 0 |
| Orchard Oriole Icterus spurius | Hooded Oriole Icterus cucullatus | 1 | 1 | 0 |
| Hooded Oriole Icterus cucullatus | Streak-backed Oriole Icterus pustulatus | 1 | 0 | 1 |
| Hooded Oriole Icterus cucullatus | Scott's Oriole Icterus parisorum | 1 | 1 | 0 |
| Streak-backed Oriole Icterus pustulatus | Bullock's Oriole Icterus bullockii | 1 | 1 | 0 |
| Bullock's Oriole Icterus bullockii | Scott's Oriole Icterus parisorum | 1 | 1 | 0 |
| Bullock's Oriole Icterus bullockii | Pine Warbler Setophaga pinus | 1 | 0 | 1 |
| Baltimore Oriole Icterus galbula | Scott's Oriole Icterus parisorum | 1 | 1 | 0 |
| Baltimore Oriole Icterus galbula | Black-throated Green Warbler Setophaga virens | 1 | 1 | 0 |
| Black-backed Oriole Icterus abeillei | Scott's Oriole Icterus parisorum | 1 | 0 | 1 |
| Scott's Oriole Icterus parisorum | Tricoloured Blackbird Agelaius tricolor | 1 | 0 | 1 |
| Bronzed Cowbird Molothrus aeneus | Brown-headed Cowbird Molothrus ater | 1 | 0 | 1 |
| Bronzed Cowbird Molothrus aeneus | Brewer's Blackbird Euphagus cyanocephalus | 1 | 1 | 0 |
| Brown-headed Cowbird Molothrus ater | Rusty Blackbird Euphagus carolinus | 1 | 0 | 1 |
| Brown-headed Cowbird Molothrus ater | Brewer's Blackbird Euphagus cyanocephalus | 1 | 0 | 1 |
| Brown-headed Cowbird Molothrus ater | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| Rusty Blackbird Euphagus carolinus | Dickcissel Spiza americana | 1 | 1 | 0 |
| Brewer's Blackbird Euphagus cyanocephalus | Common Grackle Quiscalus quiscula | 1 | 1 | 0 |
| Common Grackle Quiscalus quiscula | Redpoll Acanthis flammea | 1 | 0 | 1 |
| Worm-eating Warbler Helmitheros vermivorum | Northern Waterthrush Parkesia noveboracensis | 1 | 0 | 1 |
| Worm-eating Warbler Helmitheros vermivorum | Golden-winged Warbler Vermivora chrysoptera | 1 | 1 | 0 |
| Golden-winged Warbler Vermivora chrysoptera | Black-and-white Warbler Mniotilta varia | 1 | 1 | 0 |
| Golden-winged Warbler Vermivora chrysoptera | Yellow-rumped Warbler Setophaga coronata | 1 | 1 | 0 |
| Blue-winged Warbler Vermivora cyanoptera | Swainson's Warbler Limnothlypis swainsonii | 1 | 1 | 0 |
| Blue-winged Warbler Vermivora cyanoptera | Palm Warbler Setophaga palmarum | 1 | 1 | 0 |
| Black-and-white Warbler Mniotilta varia | Blackpoll Warbler Setophaga striata | 1 | 0 | 1 |
| Crescent-chested Warbler Oreothlypis superciliosa | Tennessee Warbler Leiothlypis peregrina | 1 | 1 | 0 |
| Crescent-chested Warbler Oreothlypis superciliosa | Northern Parula Setophaga americana | 1 | 1 | 0 |
| Tennessee Warbler Leiothlypis peregrina | Nashville Warbler Leiothlypis ruficapilla | 1 | 1 | 0 |
| Tennessee Warbler Leiothlypis peregrina | Hooded Warbler Setophaga citrina | 1 | 1 | 0 |
| Tennessee Warbler Leiothlypis peregrina | Grace's Warbler Setophaga graciae | 1 | 1 | 0 |
| Orange-crowned Warbler Leiothlypis celata | Lucy's Warbler Leiothlypis luciae | 1 | 1 | 0 |
| Nashville Warbler Leiothlypis ruficapilla | MacGillivray's Warbler Geothlypis tolmiei | 1 | 1 | 0 |
| Connecticut Warbler Oporornis agilis | MacGillivray's Warbler Geothlypis tolmiei | 1 | 1 | 0 |
| Connecticut Warbler Oporornis agilis | Mourning Warbler Geothlypis philadelphia | 1 | 0 | 1 |
| MacGillivray's Warbler Geothlypis tolmiei | Mourning Warbler Geothlypis philadelphia | 1 | 1 | 0 |
| Mourning Warbler Geothlypis philadelphia | Black-throated Green Warbler Setophaga virens | 1 | 1 | 0 |
| Common Yellowthroat Geothlypis trichas | Hooded Warbler Setophaga citrina | 1 | 0 | 1 |
| Cape May Warbler Setophaga tigrina | Northern Parula Setophaga americana | 1 | 0 | 1 |
| Cape May Warbler Setophaga tigrina | Magnolia Warbler Setophaga magnolia | 1 | 1 | 0 |
| Cape May Warbler Setophaga tigrina | Black-throated Grey Warbler Setophaga nigrescens | 1 | 0 | 1 |
| Cerulean Warbler Setophaga cerulea | Northern Parula Setophaga americana | 1 | 1 | 0 |
| Cerulean Warbler Setophaga cerulea | Tropical Parula Setophaga pitiayumi | 1 | 1 | 0 |
| Northern Parula Setophaga americana | Tropical Parula Setophaga pitiayumi | 1 | 0 | 1 |
| Northern Parula Setophaga americana | Magnolia Warbler Setophaga magnolia | 1 | 0 | 1 |
| Northern Parula Setophaga americana | Grace's Warbler Setophaga graciae | 1 | 0 | 1 |
| Tropical Parula Setophaga pitiayumi | Red-faced Warbler Cardellina rubrifrons | 1 | 1 | 0 |
| Blackburnian Warbler Setophaga fusca | Chestnut-sided Warbler Setophaga pensylvanica | 1 | 0 | 1 |
| Yellow Warbler Setophaga petechia | Chestnut-sided Warbler Setophaga pensylvanica | 1 | 0 | 1 |
| Chestnut-sided Warbler Setophaga pensylvanica | Black-throated Blue Warbler Setophaga caerulescens | 1 | 1 | 0 |
| Palm Warbler Setophaga palmarum | Canada Warbler Cardellina canadensis | 1 | 0 | 1 |
| Pine Warbler Setophaga pinus | Prairie Warbler Setophaga discolor | 1 | 1 | 0 |
| Yellow-rumped Warbler Setophaga coronata | Prairie Warbler Setophaga discolor | 1 | 0 | 1 |
| Yellow-rumped Warbler Setophaga coronata | Northern Cardinal Cardinalis cardinalis | 1 | 1 | 0 |
| Yellow-rumped Warbler Setophaga coronata | Redpoll Acanthis flammea | 1 | 1 | 0 |
| Yellow-throated Warbler Setophaga dominica | Grace's Warbler Setophaga graciae | 1 | 0 | 1 |
| Yellow-throated Warbler Setophaga dominica | Blue-grey Tanager Thraupis episcopus | 1 | 1 | 0 |
| Grace's Warbler Setophaga graciae | Townsend's Warbler Setophaga townsendi | 1 | 1 | 0 |
| Golden-cheeked Warbler Setophaga chrysoparia | Black-throated Green Warbler Setophaga virens | 1 | 0 | 1 |
| Mexican Fan-tailed Warbler Euthlypis lachrymosa | Slate-throated Redstart Myioborus miniatus | 1 | 0 | 1 |
| Rufous-capped Warbler Basileuterus rufifrons | Golden-crowned Warbler Basileuterus culicivorus | 1 | 1 | 0 |
| Rufous-capped Warbler Basileuterus rufifrons | Canada Warbler Cardellina canadensis | 1 | 0 | 1 |
| Summer Tanager Piranga rubra | Scarlet Tanager Piranga olivacea | 1 | 1 | 0 |
| Summer Tanager Piranga rubra | Western Tanager Piranga ludoviciana | 1 | 1 | 0 |
| Scarlet Tanager Piranga olivacea | Flame-coloured Tanager Piranga bidentata | 1 | 1 | 0 |
| Pyrrhuloxia Cardinalis sinuatus | Yellow Grosbeak Pheucticus chrysopeplus | 1 | 1 | 0 |
| Pyrrhuloxia Cardinalis sinuatus | Black-headed Grosbeak Pheucticus melanocephalus | 1 | 1 | 0 |
| Yellow Grosbeak Pheucticus chrysopeplus | Black-headed Grosbeak Pheucticus melanocephalus | 1 | 1 | 0 |
| Blue Grosbeak Passerina caerulea | Lazuli Bunting Passerina amoena | 1 | 0 | 1 |
| Blue Grosbeak Passerina caerulea | Blue-black Grassquit Volatinia jacarina | 1 | 0 | 1 |
| Lazuli Bunting Passerina amoena | Indigo Bunting Passerina cyanea | 1 | 0 | 1 |
| Lazuli Bunting Passerina amoena | Varied Bunting Passerina versicolor | 1 | 1 | 0 |
| Dickcissel Spiza americana | Yellow-faced Grassquit Tiaris olivaceus | 1 | 0 | 1 |
| White-eyed Vireo Vireo griseus | Bewick's Wren Thryomanes bewickii | 1 | 1 | 0 |
| Black-bellied Whistling-Duck Dendrocygna autumnalis | Fulvous Whistling-Duck Dendrocygna bicolor | 1 | 1 | 0 |
| Black-bellied Whistling-Duck Dendrocygna autumnalis | Emperor Goose Anser canagicus | 1 | 0 | 1 |
| Black-bellied Whistling-Duck Dendrocygna autumnalis | Snow Goose Anser caerulescens | 1 | 1 | 0 |
| Black-bellied Whistling-Duck Dendrocygna autumnalis | Greylag Goose Anser anser | 1 | 1 | 0 |
| Black-bellied Whistling-Duck Dendrocygna autumnalis | Cinnamon Teal Spatula cyanoptera | 1 | 0 | 1 |
| Bar-headed Goose Anser indicus | Hawaiian Goose Branta sandvicensis | 1 | 0 | 1 |
| Snow Goose Anser caerulescens | Greater White-fronted Goose Anser albifrons | 1 | 1 | 0 |
| Snow Goose Anser caerulescens | Pink-footed Goose Anser brachyrhynchus | 1 | 1 | 0 |
| Snow Goose Anser caerulescens | Cackling Goose Branta hutchinsii | 1 | 1 | 0 |
| Snow Goose Anser caerulescens | Tree Swallow Tachycineta bicolor | 1 | 1 | 0 |
| Snow Goose Anser caerulescens | Purple Martin Progne subis | 1 | 0 | 1 |
| Snow Goose Anser caerulescens | Lapland Bunting Calcarius lapponicus | 1 | 1 | 0 |
| Ross's Goose Anser rossii | Greater White-fronted Goose Anser albifrons | 1 | 1 | 0 |
| Ross's Goose Anser rossii | Pink-footed Goose Anser brachyrhynchus | 1 | 1 | 0 |
| Greylag Goose Anser anser | Solitary Sandpiper Tringa solitaria | 1 | 0 | 1 |
| Swan Goose Anser cygnoides | Greater White-fronted Goose Anser albifrons | 1 | 1 | 0 |
| Taiga Bean Goose Anser fabalis | Tundra Bean Goose Anser serrirostris | 1 | 0 | 1 |
| Tundra Bean Goose Anser serrirostris | Pink-footed Goose Anser brachyrhynchus | 1 | 0 | 1 |
| Tundra Bean Goose Anser serrirostris | Muscovy Duck Cairina moschata | 1 | 1 | 0 |
| Brent Goose Branta bernicla | Barnacle Goose Branta leucopsis | 1 | 0 | 1 |
| Canada Goose Branta canadensis | Trumpeter Swan Cygnus buccinator | 1 | 0 | 1 |
| Canada Goose Branta canadensis | Canada Warbler Cardellina canadensis | 1 | 0 | 1 |
| Hawaiian Goose Branta sandvicensis | Trumpeter Swan Cygnus buccinator | 1 | 0 | 1 |
| Hawaiian Goose Branta sandvicensis | Bewick's Swan Cygnus columbianus | 1 | 0 | 1 |
| Hawaiian Goose Branta sandvicensis | Whooper Swan Cygnus cygnus | 1 | 1 | 0 |
| Muscovy Duck Cairina moschata | Baikal Teal Sibirionetta formosa | 1 | 0 | 1 |
| Muscovy Duck Cairina moschata | Garganey Spatula querquedula | 1 | 1 | 0 |
| Garganey Spatula querquedula | American Woodcock Scolopax minor | 1 | 1 | 0 |
| Blue-winged Teal Spatula discors | Gadwall Mareca strepera | 1 | 1 | 0 |
| Cinnamon Teal Spatula cyanoptera | Northern Shoveler Spatula clypeata | 1 | 1 | 0 |
| Cinnamon Teal Spatula cyanoptera | Dusky Grouse Dendragapus obscurus | 1 | 1 | 0 |
| Northern Shoveler Spatula clypeata | Anhinga Anhinga anhinga | 1 | 0 | 1 |
| Gadwall Mareca strepera | Eurasian Wigeon Mareca penelope | 1 | 1 | 0 |
| Gadwall Mareca strepera | American Wigeon Mareca americana | 1 | 1 | 0 |
| Gadwall Mareca strepera | Marbled Murrelet Brachyramphus marmoratus | 1 | 1 | 0 |
| Gadwall Mareca strepera | Black-vented Shearwater Puffinus opisthomelas | 1 | 1 | 0 |
| American Wigeon Mareca americana | Chiloe Wigeon Mareca sibilatrix | 1 | 0 | 1 |
| Chiloe Wigeon Mareca sibilatrix | Black-winged Bishop Euplectes hordeaceus | 1 | 1 | 0 |
| Mallard Anas platyrhynchos | Mottled Duck Anas fulvigula | 1 | 0 | 1 |
| Mexican Duck Anas diazi | Northern Pintail Anas acuta | 1 | 1 | 0 |
| White-cheeked Pintail Anas bahamensis | Northern Pintail Anas acuta | 1 | 1 | 0 |
| White-cheeked Pintail Anas bahamensis | Long-tailed Duck Clangula hyemalis | 1 | 0 | 1 |
| Northern Pintail Anas acuta | Canvasback Aythya valisineria | 1 | 1 | 0 |
| Eurasian/Green-winged Teal Anas crecca | Common Pochard Aythya ferina | 1 | 1 | 0 |
| Red-crested Pochard Netta rufina | Redhead Aythya americana | 1 | 1 | 0 |
| Canvasback Aythya valisineria | Common Pochard Aythya ferina | 1 | 0 | 1 |
| Canvasback Aythya valisineria | Ladder-backed Woodpecker Dryobates scalaris | 1 | 0 | 1 |
| Redhead Aythya americana | Common Pochard Aythya ferina | 1 | 0 | 1 |
| Redhead Aythya americana | Ring-necked Duck Aythya collaris | 1 | 1 | 0 |
| Ring-necked Duck Aythya collaris | King Eider Somateria spectabilis | 1 | 1 | 0 |
| Ring-necked Duck Aythya collaris | Ruddy Duck Oxyura jamaicensis | 1 | 1 | 0 |
| Tufted Duck Aythya fuligula | Lesser Scaup Aythya affinis | 1 | 1 | 0 |
| Greater Scaup Aythya marila | Steller's Eider Polysticta stelleri | 1 | 1 | 0 |
| King Eider Somateria spectabilis | White-collared Swift Streptoprocne zonaris | 1 | 0 | 1 |
| Common Eider Somateria mollissima | White-winged Scoter Melanitta deglandi | 1 | 1 | 0 |
| Common Eider Somateria mollissima | Red-legged Kittiwake Rissa brevirostris | 1 | 0 | 1 |
| Harlequin Duck Histrionicus histrionicus | Surf Scoter Melanitta perspicillata | 1 | 0 | 1 |
| Harlequin Duck Histrionicus histrionicus | White-winged Scoter Melanitta deglandi | 1 | 0 | 1 |
| Surf Scoter Melanitta perspicillata | White-winged Scoter Melanitta deglandi | 1 | 0 | 1 |
| White-winged Scoter Melanitta deglandi | Long-tailed Duck Clangula hyemalis | 1 | 0 | 1 |
| Stejneger's Scoter Melanitta stejnegeri | Black Scoter Melanitta americana | 1 | 0 | 1 |
| Long-tailed Duck Clangula hyemalis | Bufflehead Bucephala albeola | 1 | 1 | 0 |
| Bufflehead Bucephala albeola | Common Goldeneye Bucephala clangula | 1 | 0 | 1 |
| Bufflehead Bucephala albeola | Hooded Merganser Lophodytes cucullatus | 1 | 1 | 0 |
| Common Goldeneye Bucephala clangula | Hooded Merganser Lophodytes cucullatus | 1 | 0 | 1 |
| Common Goldeneye Bucephala clangula | Ruddy Duck Oxyura jamaicensis | 1 | 0 | 1 |
| Hooded Merganser Lophodytes cucullatus | Red-breasted Merganser Mergus serrator | 1 | 1 | 0 |
| Mountain Quail Oreortyx pictus | Scaled Quail Callipepla squamata | 1 | 0 | 1 |
| Mountain Quail Oreortyx pictus | Rufous-necked Wood-Rail Aramides axillaris | 1 | 1 | 0 |
| Northern Bobwhite Colinus virginianus | Willow Ptarmigan Lagopus lagopus | 1 | 1 | 0 |
| Northern Bobwhite Colinus virginianus | Black-legged Kittiwake Rissa tridactyla | 1 | 0 | 1 |
| Northern Bobwhite Colinus virginianus | American Crow Corvus brachyrhynchos | 1 | 0 | 1 |
| Northern Bobwhite Colinus virginianus | Shore Lark Eremophila alpestris | 1 | 1 | 0 |
| Northern Bobwhite Colinus virginianus | Tree Swallow Tachycineta bicolor | 1 | 0 | 1 |
| Northern Bobwhite Colinus virginianus | Brown-chested Martin Progne tapera | 1 | 1 | 0 |
| Scaled Quail Callipepla squamata | European Golden Plover Pluvialis apricaria | 1 | 0 | 1 |
| Montezuma Quail Cyrtonyx montezumae | Greater Sage-Grouse Centrocercus urophasianus | 1 | 1 | 0 |
| Ruffed Grouse Bonasa umbellus | Greater Sage-Grouse Centrocercus urophasianus | 1 | 0 | 1 |
| Ruffed Grouse Bonasa umbellus | Spruce Grouse Canachites canadensis | 1 | 1 | 0 |
| Greater Sage-Grouse Centrocercus urophasianus | Sooty Grouse Dendragapus fuliginosus | 1 | 0 | 1 |
| Sooty Grouse Dendragapus fuliginosus | Greater Prairie-Chicken Tympanuchus cupido | 1 | 1 | 0 |
| Sharp-tailed Grouse Tympanuchus phasianellus | Greater Prairie-Chicken Tympanuchus cupido | 1 | 0 | 1 |
| Sharp-tailed Grouse Tympanuchus phasianellus | Lesser Prairie-Chicken Tympanuchus pallidicinctus | 1 | 1 | 0 |
| Sharp-tailed Grouse Tympanuchus phasianellus | Silver Pheasant Lophura nycthemera | 1 | 0 | 1 |
| Greater Prairie-Chicken Tympanuchus cupido | Lesser Prairie-Chicken Tympanuchus pallidicinctus | 1 | 0 | 1 |
| Greater Prairie-Chicken Tympanuchus cupido | Willow Ptarmigan Lagopus lagopus | 1 | 1 | 0 |
| Greater Prairie-Chicken Tympanuchus cupido | Eurasian Skylark Alauda arvensis | 1 | 0 | 1 |
| Greater Prairie-Chicken Tympanuchus cupido | Sage Thrasher Oreoscoptes montanus | 1 | 0 | 1 |
| Lesser Prairie-Chicken Tympanuchus pallidicinctus | Willow Ptarmigan Lagopus lagopus | 1 | 1 | 0 |
| Lesser Prairie-Chicken Tympanuchus pallidicinctus | Spruce Grouse Canachites canadensis | 1 | 1 | 0 |
| White-tailed Ptarmigan Lagopus leucura | Willow Ptarmigan Lagopus lagopus | 1 | 0 | 1 |
| Willow Ptarmigan Lagopus lagopus | Spruce Grouse Canachites canadensis | 1 | 1 | 0 |
| Willow Ptarmigan Lagopus lagopus | Purple Martin Progne subis | 1 | 0 | 1 |
| Willow Ptarmigan Lagopus lagopus | American Goldfinch Spinus tristis | 1 | 0 | 1 |
| Willow Ptarmigan Lagopus lagopus | Dark-eyed Junco Junco hyemalis | 1 | 1 | 0 |
| Willow Ptarmigan Lagopus lagopus | Western Meadowlark Sturnella neglecta | 1 | 1 | 0 |
| Spruce Grouse Canachites canadensis | Grey Peacock-Pheasant Polyplectron bicalcaratum | 1 | 1 | 0 |
| Spruce Grouse Canachites canadensis | Least Grebe Tachybaptus dominicus | 1 | 0 | 1 |
| Spruce Grouse Canachites canadensis | Pine Siskin Spinus pinus | 1 | 0 | 1 |
| Grey Peacock-Pheasant Polyplectron bicalcaratum | Brown Quail Synoicus ypsilophorus | 1 | 0 | 1 |
| Common Quail Coturnix coturnix | Red-legged Partridge Alectoris rufa | 1 | 0 | 1 |
| Least Grebe Tachybaptus dominicus | Pied-billed Grebe Podilymbus podiceps | 1 | 1 | 0 |
| Least Grebe Tachybaptus dominicus | Western Grebe Aechmophorus occidentalis | 1 | 1 | 0 |
| Slavonian Grebe Podiceps auritus | Clark's Grebe Aechmophorus clarkii | 1 | 0 | 1 |
| Black-necked Grebe Podiceps nigricollis | Olive-sided Flycatcher Contopus cooperi | 1 | 1 | 0 |
| Western Grebe Aechmophorus occidentalis | Clark's Grebe Aechmophorus clarkii | 1 | 1 | 0 |
| Western Grebe Aechmophorus occidentalis | Western Sandpiper Calidris mauri | 1 | 1 | 0 |
| Band-tailed Pigeon Patagioenas fasciata | Rufous Turtle Dove Streptopelia orientalis | 1 | 1 | 0 |
| Band-tailed Pigeon Patagioenas fasciata | Band-rumped Storm-Petrel Hydrobates castro | 1 | 1 | 0 |
| Rufous Turtle Dove Streptopelia orientalis | African Collared Dove Streptopelia roseogrisea | 1 | 1 | 0 |
| Laughing Dove Spilopelia senegalensis | Namaqua Dove Oena capensis | 1 | 1 | 0 |
| Diamond Dove Geopelia cuneata | White-winged Dove Zenaida asiatica | 1 | 1 | 0 |
| Inca Dove Columbina inca | Ruddy Ground Dove Columbina talpacoti | 1 | 1 | 0 |
| Common Ground Dove Columbina passerina | White-tipped Dove Leptotila verreauxi | 1 | 0 | 1 |
| Common Ground Dove Columbina passerina | Orange-billed Nightingale-Thrush Catharus aurantiirostris | 1 | 1 | 0 |
| Mourning Dove Zenaida macroura | Tree Swallow Tachycineta bicolor | 1 | 1 | 0 |
| Mourning Dove Zenaida macroura | Purple Martin Progne subis | 1 | 0 | 1 |
| Mourning Dove Zenaida macroura | Common Grackle Quiscalus quiscula | 1 | 0 | 1 |
| Groove-billed Ani Crotophaga sulcirostris | Bohemian Waxwing Bombycilla garrulus | 1 | 1 | 0 |
| Black-billed Cuckoo Coccyzus erythropthalmus | Common Cuckoo Cuculus canorus | 1 | 1 | 0 |
| Black-billed Cuckoo Coccyzus erythropthalmus | Mexican Violetear Colibri thalassinus | 1 | 0 | 1 |
| Lesser Nighthawk Chordeiles acutipennis | Common Nighthawk Chordeiles minor | 1 | 0 | 1 |
| Lesser Nighthawk Chordeiles acutipennis | Common Poorwill Phalaenoptilus nuttallii | 1 | 1 | 0 |
| Buff-collared Nightjar Antrostomus ridgwayi | Mexican Whip-poor-will Antrostomus arizonae | 1 | 0 | 1 |
| Eastern Whip-poor-will Antrostomus vociferus | Grasshopper Sparrow Ammodramus savannarum | 1 | 0 | 1 |
| Mexican Whip-poor-will Antrostomus arizonae | White-throated Thrush Turdus assimilis | 1 | 0 | 1 |
| Black Swift Cypseloides niger | Common Swift Apus apus | 1 | 0 | 1 |
| Vaux's Swift Chaetura vauxi | White-throated Swift Aeronautes saxatalis | 1 | 0 | 1 |
| Rivoli's Hummingbird Eugenes fulgens | White-eared Hummingbird Basilinna leucotis | 1 | 1 | 0 |
| Plain-capped Starthroat Heliomaster constantii | Lucifer Hummingbird Calothorax lucifer | 1 | 1 | 0 |
| Plain-capped Starthroat Heliomaster constantii | Black-chinned Hummingbird Archilochus alexandri | 1 | 1 | 0 |
| Plain-capped Starthroat Heliomaster constantii | Acadian Flycatcher Empidonax virescens | 1 | 1 | 0 |
| Blue-throated Mountain-gem Lampornis clemenciae | White-eared Hummingbird Basilinna leucotis | 1 | 1 | 0 |
| Lucifer Hummingbird Calothorax lucifer | Calliope Hummingbird Selasphorus calliope | 1 | 1 | 0 |
| Ruby-throated Hummingbird Archilochus colubris | Bumblebee Hummingbird Selasphorus heloisa | 1 | 0 | 1 |
| Black-chinned Hummingbird Archilochus alexandri | White-eared Hummingbird Basilinna leucotis | 1 | 1 | 0 |
| Costa's Hummingbird Calypte costae | Violet-crowned Hummingbird Ramosomyia violiceps | 1 | 1 | 0 |
| Calliope Hummingbird Selasphorus calliope | Rufous Hummingbird Selasphorus rufus | 1 | 0 | 1 |
| Calliope Hummingbird Selasphorus calliope | Broad-tailed Hummingbird Selasphorus platycercus | 1 | 1 | 0 |
| Rufous Hummingbird Selasphorus rufus | Broad-tailed Hummingbird Selasphorus platycercus | 1 | 1 | 0 |
| Rufous Hummingbird Selasphorus rufus | Cinnamon Hummingbird Amazilia rutila | 1 | 0 | 1 |
| Allen's Hummingbird Selasphorus sasin | Cinnamon Hummingbird Amazilia rutila | 1 | 1 | 0 |
| Bumblebee Hummingbird Selasphorus heloisa | Xantus's Hummingbird Basilinna xantusii | 1 | 1 | 0 |
| Broad-billed Hummingbird Cynanthus latirostris | Cinnamon Hummingbird Amazilia rutila | 1 | 0 | 1 |
| Ridgway's Rail Rallus obsoletus | Curve-billed Thrasher Toxostoma curvirostre | 1 | 0 | 1 |
| King Rail Rallus elegans | Clapper Rail Rallus crepitans | 1 | 1 | 0 |
| King Rail Rallus elegans | Rufous-necked Wood-Rail Aramides axillaris | 1 | 1 | 0 |
| Rufous-necked Wood-Rail Aramides axillaris | Black Rail Laterallus jamaicensis | 1 | 0 | 1 |
| American Moorhen Gallinula galeata | Purple Gallinule Porphyrio martinica | 1 | 1 | 0 |
| Purple Gallinule Porphyrio martinica | Great-tailed Grackle Quiscalus mexicanus | 1 | 0 | 1 |
| Sandhill Crane Antigone canadensis | Common Crane Grus grus | 1 | 0 | 1 |
| Sandhill Crane Antigone canadensis | White Ibis Eudocimus albus | 1 | 0 | 1 |
| Common Crane Grus grus | Hooded Crane Grus monacha | 1 | 0 | 1 |
| Hooded Crane Grus monacha | Whooping Crane Grus americana | 1 | 0 | 1 |
| Black-necked Stilt Himantopus mexicanus | Spotted Sandpiper Actitis macularius | 1 | 1 | 0 |
| American Avocet Recurvirostra americana | American Oystercatcher Haematopus palliatus | 1 | 1 | 0 |
| American Golden Plover Pluvialis dominica | Pacific Golden Plover Pluvialis fulva | 1 | 0 | 1 |
| Pacific Golden Plover Pluvialis fulva | Eurasian Dotterel Eudromias morinellus | 1 | 1 | 0 |
| Pacific Golden Plover Pluvialis fulva | Killdeer Charadrius vociferus | 1 | 0 | 1 |
| Pacific Golden Plover Pluvialis fulva | Wedge-rumped Storm-Petrel Hydrobates tethys | 1 | 0 | 1 |
| Killdeer Charadrius vociferus | Semipalmated Plover Charadrius semipalmatus | 1 | 0 | 1 |
| Common Ringed Plover Charadrius hiaticula | Semipalmated Plover Charadrius semipalmatus | 1 | 0 | 1 |
| Semipalmated Plover Charadrius semipalmatus | Piping Plover Charadrius melodus | 1 | 0 | 1 |
| Semipalmated Plover Charadrius semipalmatus | Siberian Sand Plover Anarhynchus mongolus | 1 | 0 | 1 |
| Piping Plover Charadrius melodus | Greater Sand Plover Anarhynchus leschenaultii | 1 | 0 | 1 |
| Piping Plover Charadrius melodus | Snowy Plover Anarhynchus nivosus | 1 | 0 | 1 |
| Piping Plover Charadrius melodus | Black-legged Kittiwake Rissa tridactyla | 1 | 0 | 1 |
| Wilson's Plover Anarhynchus wilsonia | Snowy Plover Anarhynchus nivosus | 1 | 1 | 0 |
| Mountain Plover Anarhynchus montanus | Upland Sandpiper Bartramia longicauda | 1 | 1 | 0 |