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 |
|---|---|---|---|---|
| Long-billed Hermit Phaethornis longirostris | Stripe-throated Hermit Phaethornis striigularis | 2 | 1 | 1 |
| Yellow-throated Warbler Setophaga dominica | Grace's Warbler Setophaga graciae | 2 | 0 | 2 |
| Muscovy Duck Cairina moschata | Blue-winged Teal Spatula discors | 1 | 0 | 1 |
| Black-throated Bobwhite Colinus nigrogularis | Spotted Wood-Quail Odontophorus guttatus | 1 | 1 | 0 |
| Least Grebe Tachybaptus dominicus | Crowned Woodnymph Thalurania colombica | 1 | 1 | 0 |
| White-crowned Pigeon Patagioenas leucocephala | Red-billed Pigeon Patagioenas flavirostris | 1 | 1 | 0 |
| Common Ground Dove Columbina passerina | Blue Ground Dove Claravis pretiosa | 1 | 1 | 0 |
| Blue Ground Dove Claravis pretiosa | Ruddy Quail-Dove Geotrygon montana | 1 | 1 | 0 |
| Ruddy Quail-Dove Geotrygon montana | Grey-headed Dove Leptotila plumbeiceps | 1 | 0 | 1 |
| Striped Cuckoo Tapera naevia | Pheasant Cuckoo Dromococcyx phasianellus | 1 | 1 | 0 |
| Long-billed Hermit Phaethornis longirostris | Purple-crowned Fairy Heliothryx barroti | 1 | 0 | 1 |
| Plain-capped Starthroat Heliomaster constantii | Canivet's Emerald Cynanthus canivetii | 1 | 0 | 1 |
| Clapper Rail Rallus crepitans | Sora Porzana carolina | 1 | 1 | 0 |
| American Moorhen Gallinula galeata | Purple Gallinule Porphyrio martinica | 1 | 0 | 1 |
| Southern Lapwing Vanellus chilensis | Snowy Plover Anarhynchus nivosus | 1 | 1 | 0 |
| Semipalmated Plover Charadrius semipalmatus | Wilson's Plover Anarhynchus wilsonia | 1 | 0 | 1 |
| Short-billed Dowitcher Limnodromus griseus | Long-billed Dowitcher Limnodromus scolopaceus | 1 | 1 | 0 |
| Dunlin Calidris alpina | White-rumped Sandpiper Calidris fuscicollis | 1 | 1 | 0 |
| Western Sandpiper Calidris mauri | Semipalmated Sandpiper Calidris pusilla | 1 | 1 | 0 |
| Masked Duck Nomonyx dominicus | Bridled Tern Onychoprion anaethetus | 1 | 0 | 1 |
| Least Tern Sternula antillarum | Caspian Tern Hydroprogne caspia | 1 | 1 | 0 |
| White Ibis Eudocimus albus | Glossy Ibis Plegadis falcinellus | 1 | 1 | 0 |
| King Vulture Sarcoramphus papa | Lesser Yellow-headed Vulture Cathartes burrovianus | 1 | 0 | 1 |
| Grey-headed Kite Leptodon cayanensis | Swallow-tailed Kite Elanoides forficatus | 1 | 0 | 1 |
| Common Black Hawk Buteogallus anthracinus | Great Black Hawk Buteogallus urubitinga | 1 | 1 | 0 |
| Turkey Vulture Cathartes aura | Solitary Eagle Buteogallus solitarius | 1 | 0 | 1 |
| White-tailed Hawk Geranoaetus albicaudatus | Broad-winged Hawk Buteo platypterus | 1 | 1 | 0 |
| Middle American Screech-Owl Megascops guatemalae | Burrowing Owl Athene cunicularia | 1 | 1 | 0 |
| Slaty-tailed Trogon Trogon massena | Gartered Violaceous Trogon Trogon caligatus | 1 | 1 | 0 |
| Black-headed Trogon Trogon melanocephalus | Gartered Violaceous Trogon Trogon caligatus | 1 | 0 | 1 |
| Tody Motmot Hylomanes momotula | Keel-billed Motmot Electron carinatum | 1 | 1 | 0 |
| Barred Antshrike Thamnophilus doliatus | Black-crowned Antshrike Thamnophilus atrinucha | 1 | 1 | 0 |
| Tawny-winged Woodcreeper Dendrocincla anabatina | Wedge-billed Woodcreeper Glyphorynchus spirurus | 1 | 1 | 0 |
| Northern Barred-Woodcreeper Dendrocolaptes sanctithomae | Strong-billed Woodcreeper Xiphocolaptes promeropirhynchus | 1 | 1 | 0 |
| Ivory-billed Woodcreeper Xiphorhynchus flavigaster | Streak-headed Woodcreeper Lepidocolaptes souleyetii | 1 | 0 | 1 |
| Streak-headed Woodcreeper Lepidocolaptes souleyetii | Fawn-throated Foliage-gleaner Automolus cervinigularis | 1 | 0 | 1 |
| Northern Bentbill Oncostoma cinereigulare | Slate-headed Tody-Flycatcher Poecilotriccus sylvia | 1 | 0 | 1 |
| Common Tody-Flycatcher Todirostrum cinereum | Yellow-bellied Tyrannulet Ornithion semiflavum | 1 | 0 | 1 |
| Yellow-bellied Tyrannulet Ornithion semiflavum | Greenish Elaenia Myiopagis viridicata | 1 | 0 | 1 |
| Yellow-bellied Flycatcher Empidonax flaviventris | Acadian Flycatcher Empidonax virescens | 1 | 1 | 0 |
| Vermilion Flycatcher Pyrocephalus rubinus | Rufous Mourner Rhytipterna holerythra | 1 | 0 | 1 |
| Yucatan Flycatcher Myiarchus yucatanensis | Great Crested Flycatcher Myiarchus crinitus | 1 | 0 | 1 |
| Grey-collared Becard Pachyramphus major | Yellow-throated Vireo Vireo flavifrons | 1 | 0 | 1 |
| White-winged Becard Pachyramphus polychopterus | Plumbeous Vireo Vireo plumbeus | 1 | 0 | 1 |
| Plumbeous Vireo Vireo plumbeus | Yellow-green Vireo Vireo flavoviridis | 1 | 1 | 0 |
| Philadelphia Vireo Vireo philadelphicus | Yucatan Vireo Vireo magister | 1 | 0 | 1 |
| Yellow-green Vireo Vireo flavoviridis | Yucatan Vireo Vireo magister | 1 | 0 | 1 |
| Purple Martin Progne subis | Grey-breasted Martin Progne chalybea | 1 | 0 | 1 |
| Grey-breasted Martin Progne chalybea | Cliff Swallow Petrochelidon pyrrhonota | 1 | 0 | 1 |
| White-browed Gnatcatcher Polioptila bilineata | Blue-grey Gnatcatcher Polioptila caerulea | 1 | 1 | 0 |
| Long-billed Gnatwren Ramphocaenus melanurus | Nightingale Wren Microcerculus philomela | 1 | 0 | 1 |
| Black Catbird Melanoptila glabrirostris | Thick-billed Seed-Finch Sporophila funerea | 1 | 1 | 0 |
| Slate-coloured Solitaire Myadestes unicolor | Veery Catharus fuscescens | 1 | 0 | 1 |
| Hermit Thrush Catharus guttatus | Wood Thrush Hylocichla mustelina | 1 | 1 | 0 |
| Slate-coloured Solitaire Myadestes unicolor | Wood Thrush Hylocichla mustelina | 1 | 0 | 1 |
| Grasshopper Sparrow Ammodramus savannarum | Olive Sparrow Arremonops rufivirgatus | 1 | 0 | 1 |
| Olive Sparrow Arremonops rufivirgatus | Rusty Sparrow Aimophila rufescens | 1 | 1 | 0 |
| Olive Sparrow Arremonops rufivirgatus | Green-backed Sparrow Arremonops chloronotus | 1 | 0 | 1 |
| Chipping Sparrow Spizella passerina | Rusty Sparrow Aimophila rufescens | 1 | 0 | 1 |
| Melodious Blackbird Dives dives | Great-tailed Grackle Quiscalus mexicanus | 1 | 1 | 0 |
| Ovenbird Seiurus aurocapilla | Louisiana Waterthrush Parkesia motacilla | 1 | 0 | 1 |
| Orange-crowned Warbler Leiothlypis celata | Cape May Warbler Setophaga tigrina | 1 | 0 | 1 |
| Hepatic Tanager Piranga flava | Scarlet Tanager Piranga olivacea | 1 | 0 | 1 |
| Red-crowned Ant-Tanager Habia rubica | Black-faced Grosbeak Caryothraustes poliogaster | 1 | 1 | 0 |
| Black-faced Grosbeak Caryothraustes poliogaster | Blue-black Grosbeak Cyanoloxia cyanoides | 1 | 1 | 0 |
| Slate-coloured Seedeater Sporophila schistacea | Yellow-faced Grassquit Tiaris olivaceus | 1 | 1 | 0 |
| Buff-throated Saltator Saltator maximus | Black-headed Saltator Saltator atriceps | 1 | 0 | 1 |