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 |
|---|---|---|---|---|
| Cackling Goose Branta hutchinsii | Canada Goose Branta canadensis | 1 | 1 | 0 |
| Plain Chachalaca Ortalis vetula | West Mexican Chachalaca Ortalis poliocephala | 1 | 0 | 1 |
| Grey-headed Dove Leptotila plumbeiceps | White-faced Quail-Dove Zentrygon albifacies | 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 |
| 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 |
| Black Storm-Petrel Hydrobates melania | Least Storm-Petrel Hydrobates microsoma | 1 | 0 | 1 |
| Manx Shearwater Puffinus puffinus | Sargasso Shearwater Puffinus lherminieri | 1 | 1 | 0 |
| Brandt's Cormorant Urile penicillatus | Pelagic Cormorant Urile pelagicus | 1 | 0 | 1 |
| Rough-legged Buzzard Buteo lagopus | Ferruginous Hawk Buteo regalis | 1 | 1 | 0 |
| Colima Pygmy-Owl Glaucidium palmarum | Ferruginous Pygmy-Owl Glaucidium brasilianum | 1 | 0 | 1 |
| Strickland's Woodpecker Leuconotopicus stricklandi | Arizona Woodpecker Leuconotopicus arizonae | 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 |
| Northern Schiffornis Schiffornis veraepacis | Speckled Mourner Laniocera rufescens | 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 | Grey Flycatcher Empidonax wrightii | 1 | 0 | 1 |
| Dusky-capped Flycatcher Myiarchus tuberculifer | Nutting's Flycatcher Myiarchus nuttingi | 1 | 1 | 0 |
| Dwarf Jay Cyanolyca nanus | Black-throated Jay Cyanolyca pumilo | 1 | 0 | 1 |
| American Crow Corvus brachyrhynchos | Tamaulipas Crow Corvus imparatus | 1 | 1 | 0 |
| Purple Martin Progne subis | Grey-breasted Martin Progne chalybea | 1 | 0 | 1 |
| Sumichrast's Wren Hylorchilus sumichrasti | Nava's Wren Hylorchilus navai | 1 | 0 | 1 |
| Sinaloa Wren Thryophilus sinaloa | Cabanis's Wren Cantorchilus modestus | 1 | 1 | 0 |
| Ocellated Thrasher Toxostoma ocellatum | Long-billed Thrasher Toxostoma longirostre | 1 | 0 | 1 |
| Mountain Thrush Turdus plebejus | White-throated Thrush Turdus assimilis | 1 | 1 | 0 |
| Sagebrush Sparrow Artemisiospiza nevadensis | Bell's Sparrow Artemisiospiza belli | 1 | 0 | 1 |
| Vesper Sparrow Pooecetes gramineus | LeConte's Sparrow Ammospiza leconteii | 1 | 1 | 0 |
| Canyon Towhee Melozone fusca | Abert's Towhee Melozone aberti | 1 | 0 | 1 |
| Barn Swallow Hirundo rustica | California Towhee Melozone crissalis | 1 | 0 | 1 |
| White-faced Ground-Sparrow Melozone biarcuata | Rufous-crowned Sparrow Aimophila ruficeps | 1 | 1 | 0 |
| Chestnut-headed Oropendola Psarocolius wagleri | Montezuma Oropendola Psarocolius montezuma | 1 | 1 | 0 |
| Northern Shoveler Spatula clypeata | Great-tailed Grackle Quiscalus mexicanus | 1 | 0 | 1 |
| 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 |
| Varied Bunting Passerina versicolor | Painted Bunting Passerina ciris | 1 | 1 | 0 |