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 |
|---|---|---|---|---|
| White-rumped Sandpiper Calidris fuscicollis | Semipalmated Sandpiper Calidris pusilla | 2 | 1 | 1 |
| Solitary Sandpiper Tringa solitaria | Lesser Yellowlegs Tringa flavipes | 2 | 2 | 0 |
| White-cheeked Pintail Anas bahamensis | Ruddy Duck Oxyura jamaicensis | 1 | 0 | 1 |
| Scaly-naped Pigeon Patagioenas squamosa | Common Ground Dove Columbina passerina | 1 | 0 | 1 |
| Common Ground Dove Columbina passerina | Zenaida Dove Zenaida aurita | 1 | 0 | 1 |
| Puerto Rican Mango Anthracothorax aurulentus | Green-throated Carib Eulampis holosericeus | 1 | 0 | 1 |
| Puerto Rican Mango Anthracothorax aurulentus | Antillean Crested Hummingbird Orthorhyncus cristatus | 1 | 0 | 1 |
| Green-throated Carib Eulampis holosericeus | Grey Kingbird Tyrannus dominicensis | 1 | 0 | 1 |
| Antillean Crested Hummingbird Orthorhyncus cristatus | Pearly-eyed Thrasher Margarops fuscatus | 1 | 1 | 0 |
| Grey Plover Pluvialis squatarola | American Golden Plover Pluvialis dominica | 1 | 0 | 1 |
| Grey Plover Pluvialis squatarola | Semipalmated Plover Charadrius semipalmatus | 1 | 1 | 0 |
| Hudsonian Godwit Limosa haemastica | Marbled Godwit Limosa fedoa | 1 | 0 | 1 |
| Short-billed Dowitcher Limnodromus griseus | Long-billed Dowitcher Limnodromus scolopaceus | 1 | 1 | 0 |
| Lesser Yellowlegs Tringa flavipes | Greater Yellowlegs Tringa melanoleuca | 1 | 1 | 0 |
| Stilt Sandpiper Calidris himantopus | White-rumped Sandpiper Calidris fuscicollis | 1 | 1 | 0 |
| Stilt Sandpiper Calidris himantopus | Pectoral Sandpiper Calidris melanotos | 1 | 0 | 1 |
| Least Sandpiper Calidris minutilla | Semipalmated Sandpiper Calidris pusilla | 1 | 1 | 0 |
| Semipalmated Sandpiper Calidris pusilla | Western Cattle-Egret Ardea ibis | 1 | 1 | 0 |
| Arctic Skua Stercorarius parasiticus | Pomarine Skua Stercorarius pomarinus | 1 | 0 | 1 |
| Laughing Gull Leucophaeus atricilla | Magnificent Frigatebird Fregata magnificens | 1 | 0 | 1 |
| Gull-billed Tern Gelochelidon nilotica | White-winged Black Tern Chlidonias leucopterus | 1 | 1 | 0 |
| Common Tern Sterna hirundo | Roseate Tern Sterna dougallii | 1 | 1 | 0 |
| Sandwich Tern Thalasseus sandvicensis | Royal Tern Thalasseus maximus | 1 | 1 | 0 |
| Snowy Egret Egretta thula | Western Cattle-Egret Ardea ibis | 1 | 1 | 0 |
| Great Blue Heron Ardea herodias | Red-tailed Hawk Buteo jamaicensis | 1 | 0 | 1 |
| Cliff Swallow Petrochelidon pyrrhonota | Cave Swallow Petrochelidon fulva | 1 | 0 | 1 |
| Louisiana Waterthrush Parkesia motacilla | Northern Waterthrush Parkesia noveboracensis | 1 | 0 | 1 |
| Golden-winged Warbler Vermivora chrysoptera | Blue-winged Warbler Vermivora cyanoptera | 1 | 0 | 1 |
| Connecticut Warbler Oporornis agilis | Common Yellowthroat Geothlypis trichas | 1 | 1 | 0 |
| American Redstart Setophaga ruticilla | Yellow Warbler Setophaga petechia | 1 | 0 | 1 |
| Cape May Warbler Setophaga tigrina | Magnolia Warbler Setophaga magnolia | 1 | 1 | 0 |
| Yellow Warbler Setophaga petechia | Prairie Warbler Setophaga discolor | 1 | 0 | 1 |
| Yellow-throated Warbler Setophaga dominica | Adelaide's Warbler Setophaga adelaidae | 1 | 0 | 1 |
| Summer Tanager Piranga rubra | Scarlet Tanager Piranga olivacea | 1 | 0 | 1 |
| White-faced Whistling-Duck Dendrocygna viduata | West Indian Whistling-Duck Dendrocygna arborea | 1 | 0 | 1 |
| Lesser Antillean Bullfinch Loxigilla noctis | Black-faced Grassquit Melanospiza bicolor | 1 | 0 | 1 |
| Blue-winged Teal Spatula discors | White-cheeked Pintail Anas bahamensis | 1 | 1 | 0 |