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 |
|---|---|---|---|---|
| Sulphur-bellied Flycatcher Myiodynastes luteiventris | Piratic Flycatcher Legatus leucophaius | 4 | 4 | 0 |
| Tropical Kingbird Tyrannus melancholicus | Couch's Kingbird Tyrannus couchii | 4 | 2 | 2 |
| Hammond's Flycatcher Empidonax hammondii | Dusky Flycatcher Empidonax oberholseri | 4 | 2 | 2 |
| Northern Beardless-Tyrannulet Camptostoma imberbe | Greenish Elaenia Myiopagis viridicata | 3 | 1 | 2 |
| Northern Tropical Pewee Contopus bogotensis | Eastern Wood-Pewee Contopus virens | 3 | 1 | 2 |
| Dusky-capped Flycatcher Myiarchus tuberculifer | Nutting's Flycatcher Myiarchus nuttingi | 3 | 3 | 0 |
| Great Kiskadee Pitangus sulphuratus | Boat-billed Flycatcher Megarynchus pitangua | 2 | 0 | 2 |
| Great Kiskadee Pitangus sulphuratus | Social Flycatcher Myiozetetes similis | 2 | 1 | 1 |
| Western Wood-Pewee Contopus sordidulus | Northern Tropical Pewee Contopus bogotensis | 2 | 1 | 1 |
| Townsend's Storm-Petrel Hydrobates socorroensis | Wedge-rumped Storm-Petrel Hydrobates tethys | 2 | 2 | 0 |
| Couch's Kingbird Tyrannus couchii | Western Kingbird Tyrannus verticalis | 2 | 2 | 0 |
| Cassin's Kingbird Tyrannus vociferans | Western Kingbird Tyrannus verticalis | 2 | 1 | 1 |
| Western Flycatcher Empidonax difficilis | Yellowish Flycatcher Empidonax flavescens | 2 | 2 | 0 |
| Vesper Sparrow Pooecetes gramineus | Baird's Sparrow Centronyx bairdii | 2 | 1 | 1 |
| Lesson's Motmot Momotus lessonii | Turquoise-browed Motmot Eumomota superciliosa | 2 | 1 | 1 |
| Nutting's Flycatcher Myiarchus nuttingi | Great Crested Flycatcher Myiarchus crinitus | 2 | 2 | 0 |
| Great Crested Flycatcher Myiarchus crinitus | Brown-crested Flycatcher Myiarchus tyrannulus | 2 | 0 | 2 |
| Laughing Gull Leucophaeus atricilla | Franklin's Gull Leucophaeus pipixcan | 1 | 0 | 1 |
| Yellow-footed Gull Larus livens | Glaucous Gull Larus hyperboreus | 1 | 1 | 0 |
| Kelp Gull Larus dominicanus | Herring Gull Larus argentatus | 1 | 1 | 0 |
| Wilson's Storm-Petrel Oceanites oceanicus | Leach's Storm-Petrel Hydrobates leucorhous | 1 | 1 | 0 |
| Townsend's Storm-Petrel Hydrobates socorroensis | Ainley's Storm-Petrel Hydrobates cheimomnestes | 1 | 0 | 1 |
| Townsend's Storm-Petrel Hydrobates socorroensis | Black Storm-Petrel Hydrobates melania | 1 | 0 | 1 |
| Townsend's Storm-Petrel Hydrobates socorroensis | Guadalupe Storm-Petrel Hydrobates macrodactylus | 1 | 0 | 1 |
| Black Storm-Petrel Hydrobates melania | Least Storm-Petrel Hydrobates microsoma | 1 | 0 | 1 |
| Wedge-tailed Shearwater Ardenna pacifica | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Manx Shearwater Puffinus puffinus | Sargasso Shearwater Puffinus lherminieri | 1 | 1 | 0 |
| Brandt's Cormorant Urile penicillatus | Pelagic Cormorant Urile pelagicus | 1 | 0 | 1 |
| Glossy Ibis Plegadis falcinellus | White-faced Ibis Plegadis chihi | 1 | 1 | 0 |
| King Vulture Sarcoramphus papa | Crested Eagle Morphnus guianensis | 1 | 1 | 0 |
| Sharp-shinned Hawk Accipiter striatus | Cooper's Hawk Astur cooperii | 1 | 1 | 0 |
| Grey Hawk Buteo plagiatus | Broad-winged Hawk Buteo platypterus | 1 | 0 | 1 |
| Grey Hawk Buteo plagiatus | Swainson's Hawk Buteo swainsoni | 1 | 1 | 0 |
| Rough-legged Buzzard Buteo lagopus | Ferruginous Hawk Buteo regalis | 1 | 1 | 0 |
| Whiskered Screech-Owl Megascops trichopsis | Middle American Screech-Owl Megascops guatemalae | 1 | 1 | 0 |
| Colima Pygmy-Owl Glaucidium palmarum | Ferruginous Pygmy-Owl Glaucidium brasilianum | 1 | 0 | 1 |
| Mottled Owl Strix virgata | Cinereous Owl Strix sartorii | 1 | 0 | 1 |
| Strickland's Woodpecker Leuconotopicus stricklandi | Arizona Woodpecker Leuconotopicus arizonae | 1 | 1 | 0 |
| Pale-billed Woodpecker Campephilus guatemalensis | Lineated Woodpecker Dryocopus lineatus | 1 | 1 | 0 |
| Maroon-fronted Parrot Rhynchopsitta terrisi | Olive-throated Parakeet Eupsittula nana | 1 | 0 | 1 |
| Dot-winged Antwren Microrhopias quixensis | Dusky Antbird Cercomacroides tyrannina | 1 | 0 | 1 |
| Ruddy Woodcreeper Dendrocincla homochroa | Northern Barred-Woodcreeper Dendrocolaptes sanctithomae | 1 | 0 | 1 |
| Tawny-winged Woodcreeper Dendrocincla anabatina | Rufous-breasted Spinetail Synallaxis erythrothorax | 1 | 0 | 1 |
| Northern Schiffornis Schiffornis veraepacis | Speckled Mourner Laniocera rufescens | 1 | 0 | 1 |
| Stub-tailed Spadebill Platyrinchus cancrominus | Northern Bentbill Oncostoma cinereigulare | 1 | 0 | 1 |
| Ochre-bellied Flycatcher Mionectes oleagineus | Northern Bentbill Oncostoma cinereigulare | 1 | 0 | 1 |
| Ochre-bellied Flycatcher Mionectes oleagineus | Yellow-olive Flatbill Tolmomyias sulphurescens | 1 | 1 | 0 |
| Ochre-bellied Flycatcher Mionectes oleagineus | Northern Beardless-Tyrannulet Camptostoma imberbe | 1 | 1 | 0 |
| Northern Bentbill Oncostoma cinereigulare | Common Tody-Flycatcher Todirostrum cinereum | 1 | 0 | 1 |
| Common Tody-Flycatcher Todirostrum cinereum | Yellow-olive Flatbill Tolmomyias sulphurescens | 1 | 0 | 1 |
| Yellow-olive Flatbill Tolmomyias sulphurescens | Northern Beardless-Tyrannulet Camptostoma imberbe | 1 | 0 | 1 |
| Yellow-olive Flatbill Tolmomyias sulphurescens | Greenish Elaenia Myiopagis viridicata | 1 | 0 | 1 |
| Yellow-olive Flatbill Tolmomyias sulphurescens | Yellow-bellied Elaenia Elaenia flavogaster | 1 | 1 | 0 |
| Greenish Elaenia Myiopagis viridicata | Yellow-bellied Elaenia Elaenia flavogaster | 1 | 0 | 1 |
| Yellow-bellied Elaenia Elaenia flavogaster | Greater Pewee Contopus pertinax | 1 | 0 | 1 |
| Greater Pewee Contopus pertinax | Northern Tropical Pewee Contopus bogotensis | 1 | 0 | 1 |
| Western Wood-Pewee Contopus sordidulus | Eastern Wood-Pewee Contopus virens | 1 | 1 | 0 |
| Eastern Wood-Pewee Contopus virens | Yellow-bellied Flycatcher Empidonax flaviventris | 1 | 0 | 1 |
| Acadian Flycatcher Empidonax virescens | Alder Flycatcher Empidonax alnorum | 1 | 0 | 1 |
| Alder Flycatcher Empidonax alnorum | White-throated Flycatcher Empidonax albigularis | 1 | 1 | 0 |
| Least Flycatcher Empidonax minimus | Hammond's Flycatcher Empidonax hammondii | 1 | 0 | 1 |
| Least Flycatcher Empidonax minimus | Grey Flycatcher Empidonax wrightii | 1 | 0 | 1 |
| Western Flycatcher Empidonax difficilis | Buff-breasted Flycatcher Empidonax fulvifrons | 1 | 1 | 0 |
| Black Phoebe Sayornis nigricans | Eastern Phoebe Sayornis phoebe | 1 | 0 | 1 |
| Say's Phoebe Sayornis saya | Vermilion Flycatcher Pyrocephalus rubinus | 1 | 1 | 0 |
| Say's Phoebe Sayornis saya | Yucatan Flycatcher Myiarchus yucatanensis | 1 | 1 | 0 |
| Yucatan Flycatcher Myiarchus yucatanensis | Dusky-capped Flycatcher Myiarchus tuberculifer | 1 | 1 | 0 |
| Yucatan Flycatcher Myiarchus yucatanensis | Ash-throated Flycatcher Myiarchus cinerascens | 1 | 0 | 1 |
| Ash-throated Flycatcher Myiarchus cinerascens | Nutting's Flycatcher Myiarchus nuttingi | 1 | 0 | 1 |
| Ash-throated Flycatcher Myiarchus cinerascens | Great Crested Flycatcher Myiarchus crinitus | 1 | 0 | 1 |
| Ash-throated Flycatcher Myiarchus cinerascens | Brown-crested Flycatcher Myiarchus tyrannulus | 1 | 1 | 0 |
| Social Flycatcher Myiozetetes similis | Sulphur-bellied Flycatcher Myiodynastes luteiventris | 1 | 0 | 1 |
| Streaked Flycatcher Myiodynastes maculatus | Sulphur-bellied Flycatcher Myiodynastes luteiventris | 1 | 1 | 0 |
| Couch's Kingbird Tyrannus couchii | Cassin's Kingbird Tyrannus vociferans | 1 | 1 | 0 |
| Thick-billed Kingbird Tyrannus crassirostris | Western Kingbird Tyrannus verticalis | 1 | 0 | 1 |
| Thick-billed Kingbird Tyrannus crassirostris | Eastern Kingbird Tyrannus tyrannus | 1 | 1 | 0 |
| Eastern Kingbird Tyrannus tyrannus | Fork-tailed Flycatcher Tyrannus savana | 1 | 0 | 1 |
| Lesser Greenlet Pachysylvia decurtata | Dwarf Vireo Vireo nelsoni | 1 | 1 | 0 |
| Hutton's Vireo Vireo huttoni | Cassin's Vireo Vireo cassinii | 1 | 1 | 0 |
| Cassin's Vireo Vireo cassinii | Plumbeous Vireo Vireo plumbeus | 1 | 0 | 1 |
| Red-eyed Vireo Vireo olivaceus | Yucatan Vireo Vireo magister | 1 | 1 | 0 |
| Dwarf Jay Cyanolyca nanus | Black-throated Jay Cyanolyca pumilo | 1 | 0 | 1 |
| Yucatan Jay Cyanocorax yucatanicus | Pyrrhuloxia Cardinalis sinuatus | 1 | 0 | 1 |
| American Crow Corvus brachyrhynchos | Tamaulipas Crow Corvus imparatus | 1 | 1 | 0 |
| Common Raven Corvus corax | Great-tailed Grackle Quiscalus mexicanus | 1 | 0 | 1 |
| Mountain Chickadee Poecile gambeli | Bridled Titmouse Baeolophus wollweberi | 1 | 1 | 0 |
| Purple Martin Progne subis | Grey-breasted Martin Progne chalybea | 1 | 0 | 1 |
| Northern Rough-winged Swallow Stelgidopteryx serripennis | Cave Swallow Petrochelidon fulva | 1 | 1 | 0 |
| Barn Swallow Hirundo rustica | California Towhee Melozone crissalis | 1 | 0 | 1 |
| Canyon Wren Catherpes mexicanus | Yucatan Wren Campylorhynchus yucatanicus | 1 | 1 | 0 |
| Sumichrast's Wren Hylorchilus sumichrasti | Nava's Wren Hylorchilus navai | 1 | 0 | 1 |
| Clarion Wren Troglodytes tanneri | Rufous-browed Wren Troglodytes rufociliatus | 1 | 0 | 1 |
| Rufous-naped Wren Campylorhynchus rufinucha | Boucard's Wren Campylorhynchus jocosus | 1 | 1 | 0 |
| Sinaloa Wren Thryophilus sinaloa | Cabanis's Wren Cantorchilus modestus | 1 | 1 | 0 |
| Curve-billed Thrasher Toxostoma curvirostre | Long-billed Thrasher Toxostoma longirostre | 1 | 0 | 1 |
| Curve-billed Thrasher Toxostoma curvirostre | Cozumel Thrasher Toxostoma guttatum | 1 | 1 | 0 |
| Ocellated Thrasher Toxostoma ocellatum | Long-billed Thrasher Toxostoma longirostre | 1 | 0 | 1 |
| Long-billed Thrasher Toxostoma longirostre | Grey Thrasher Toxostoma cinereum | 1 | 0 | 1 |
| Grey Thrasher Toxostoma cinereum | Sage Thrasher Oreoscoptes montanus | 1 | 0 | 1 |
| Socorro Mockingbird Mimus graysoni | Northern Mockingbird Mimus polyglottos | 1 | 1 | 0 |
| Mountain Thrush Turdus plebejus | White-throated Thrush Turdus assimilis | 1 | 1 | 0 |
| Rufous-collared Robin Turdus rufitorques | Phainopepla Phainopepla nitens | 1 | 0 | 1 |
| Pine Siskin Spinus pinus | Lesser Goldfinch Spinus psaltria | 1 | 1 | 0 |
| Stripe-headed Sparrow Peucaea ruficauda | Bridled Sparrow Peucaea mystacalis | 1 | 0 | 1 |
| Olive Sparrow Arremonops rufivirgatus | Green-backed Sparrow Arremonops chloronotus | 1 | 0 | 1 |
| Lark Bunting Calamospiza melanocorys | Guadalupe Junco Junco insularis | 1 | 1 | 0 |
| Baird's Junco Junco bairdi | Rufous-collared Sparrow Zonotrichia capensis | 1 | 0 | 1 |
| Sagebrush Sparrow Artemisiospiza nevadensis | Bell's Sparrow Artemisiospiza belli | 1 | 0 | 1 |
| Vesper Sparrow Pooecetes gramineus | LeConte's Sparrow Ammospiza leconteii | 1 | 1 | 0 |
| Rusty-crowned Ground-Sparrow Melozone kieneri | Canyon Towhee Melozone fusca | 1 | 0 | 1 |
| Canyon Towhee Melozone fusca | Abert's Towhee Melozone aberti | 1 | 0 | 1 |
| White-faced Ground-Sparrow Melozone biarcuata | Rufous-crowned Sparrow Aimophila ruficeps | 1 | 1 | 0 |
| Rusty Sparrow Aimophila rufescens | Rufous-crowned Sparrow Aimophila ruficeps | 1 | 1 | 0 |
| Western Meadowlark Sturnella neglecta | Chihuahuan Meadowlark Sturnella lilianae | 1 | 1 | 0 |
| Chestnut-headed Oropendola Psarocolius wagleri | Montezuma Oropendola Psarocolius montezuma | 1 | 1 | 0 |
| Black-cowled Oriole Icterus prosthemelas | Yellow-backed Oriole Icterus chrysater | 1 | 1 | 0 |
| Orange-crowned Warbler Leiothlypis celata | Lucy's Warbler Leiothlypis luciae | 1 | 1 | 0 |
| Grey-crowned Yellowthroat Geothlypis poliocephala | Mourning Warbler Geothlypis philadelphia | 1 | 0 | 1 |
| Rose-throated Tanager Piranga roseogularis | Hepatic Tanager Piranga flava | 1 | 0 | 1 |
| Summer Tanager Piranga rubra | Western Tanager Piranga ludoviciana | 1 | 0 | 1 |
| Yellow Grosbeak Pheucticus chrysopeplus | Black-headed Grosbeak Pheucticus melanocephalus | 1 | 0 | 1 |
| Cackling Goose Branta hutchinsii | Canada Goose Branta canadensis | 1 | 1 | 0 |
| Varied Bunting Passerina versicolor | Painted Bunting Passerina ciris | 1 | 1 | 0 |
| Northern Shoveler Spatula clypeata | Great-tailed Grackle Quiscalus mexicanus | 1 | 0 | 1 |
| Plain Chachalaca Ortalis vetula | Rufous-bellied Chachalaca Ortalis wagleri | 1 | 1 | 0 |
| Plain Chachalaca Ortalis vetula | West Mexican Chachalaca Ortalis poliocephala | 1 | 0 | 1 |
| Banded Quail Philortyx fasciatus | Elegant Quail Callipepla douglasii | 1 | 1 | 0 |
| Least Grebe Tachybaptus dominicus | Pied-billed Grebe Podilymbus podiceps | 1 | 0 | 1 |
| Grey-headed Dove Leptotila plumbeiceps | White-faced Quail-Dove Zentrygon albifacies | 1 | 0 | 1 |
| Eared Poorwill Nyctiphrynus mcleodii | Yucatan Poorwill Nyctiphrynus yucatanicus | 1 | 0 | 1 |
| Yucatan Poorwill Nyctiphrynus yucatanicus | Tawny-collared Nightjar Antrostomus salvini | 1 | 0 | 1 |
| Ruby-throated Hummingbird Archilochus colubris | Black-chinned Hummingbird Archilochus alexandri | 1 | 1 | 0 |
| Ruby-throated Hummingbird Archilochus colubris | Anna's Hummingbird Calypte anna | 1 | 1 | 0 |
| Costa's Hummingbird Calypte costae | Broad-tailed Hummingbird Selasphorus platycercus | 1 | 0 | 1 |
| White-eared Hummingbird Basilinna leucotis | Wedge-tailed Sabrewing Pampa curvipennis | 1 | 0 | 1 |
| Wedge-tailed Sabrewing Pampa curvipennis | Violet Sabrewing Campylopterus hemileucurus | 1 | 1 | 0 |
| Russet-naped Wood-Rail Aramides albiventris | Ruddy Crake Laterallus ruber | 1 | 0 | 1 |
| Grey Plover Pluvialis squatarola | American Golden Plover Pluvialis dominica | 1 | 1 | 0 |
| Collared Plover Anarhynchus collaris | Snowy Plover Anarhynchus nivosus | 1 | 0 | 1 |