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 |
|---|---|---|---|---|
| Barrow's Goldeneye Bucephala islandica | Goosander Mergus merganser | 1 | 0 | 1 |
| Pied-billed Grebe Podilymbus podiceps | Western Grebe Aechmophorus occidentalis | 1 | 0 | 1 |
| Slavonian Grebe Podiceps auritus | Black-necked Grebe Podiceps nigricollis | 1 | 0 | 1 |
| Yellow-billed Cuckoo Coccyzus americanus | Black-billed Cuckoo Coccyzus erythropthalmus | 1 | 1 | 0 |
| Black-chinned Hummingbird Archilochus alexandri | Anna's Hummingbird Calypte anna | 1 | 0 | 1 |
| Double-crested Cormorant Nannopterum auritum | Neotropic Cormorant Nannopterum brasilianum | 1 | 0 | 1 |
| Cooper's Hawk Astur cooperii | Broad-winged Hawk Buteo platypterus | 1 | 0 | 1 |
| Harris's Hawk Parabuteo unicinctus | Swainson's Hawk Buteo swainsoni | 1 | 0 | 1 |
| Red-bellied Woodpecker Melanerpes carolinus | Pileated Woodpecker Dryocopus pileatus | 1 | 0 | 1 |
| Merlin Falco columbarius | Prairie Falcon Falco mexicanus | 1 | 0 | 1 |
| Yellow-throated Vireo Vireo flavifrons | Red-eyed Vireo Vireo olivaceus | 1 | 0 | 1 |
| Veery Catharus fuscescens | Swainson's Thrush Catharus ustulatus | 1 | 0 | 1 |
| Veery Catharus fuscescens | Hermit Thrush Catharus guttatus | 1 | 1 | 0 |
| House Finch Haemorhous mexicanus | Purple Finch Haemorhous purpureus | 1 | 0 | 1 |
| Grasshopper Sparrow Ammodramus savannarum | Chipping Sparrow Spizella passerina | 1 | 1 | 0 |
| Dark-eyed Junco Junco hyemalis | Brewer's Blackbird Euphagus cyanocephalus | 1 | 0 | 1 |
| Brown-headed Cowbird Molothrus ater | Rusty Blackbird Euphagus carolinus | 1 | 0 | 1 |
| Tennessee Warbler Leiothlypis peregrina | Virginia's Warbler Leiothlypis virginiae | 1 | 1 | 0 |
| Blue Grosbeak Passerina caerulea | Lazuli Bunting Passerina amoena | 1 | 1 | 0 |