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 |
|---|---|---|---|---|
| Marsh Warbler Acrocephalus palustris | Common Reed Warbler Acrocephalus scirpaceus | 2 | 1 | 1 |
| Tundra Bean Goose Anser serrirostris | European Golden Plover Pluvialis apricaria | 1 | 1 | 0 |
| Bewick's Swan Cygnus columbianus | Whooper Swan Cygnus cygnus | 1 | 1 | 0 |
| Garganey Spatula querquedula | Steller's Eider Polysticta stelleri | 1 | 1 | 0 |
| Goosander Mergus merganser | Red-breasted Merganser Mergus serrator | 1 | 0 | 1 |
| European Turtle Dove Streptopelia turtur | Collared Dove Streptopelia decaocto | 1 | 0 | 1 |
| Eurasian Nightjar Caprimulgus europaeus | Eurasian Nuthatch Sitta europaea | 1 | 0 | 1 |
| Pied Avocet Recurvirostra avosetta | Peregrine Falcon Falco peregrinus | 1 | 1 | 0 |
| Eurasian Curlew Numenius arquata | Lapland Bunting Calcarius lapponicus | 1 | 1 | 0 |
| Great Snipe Gallinago media | Common Snipe Gallinago gallinago | 1 | 1 | 0 |
| Ruddy Turnstone Arenaria interpres | Red Knot Calidris canutus | 1 | 1 | 0 |
| Ruddy Turnstone Arenaria interpres | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Sanderling Calidris alba | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Pomarine Skua Stercorarius pomarinus | Razorbill Alca torda | 1 | 1 | 0 |
| Herring Gull Larus argentatus | Lesser Black-backed Gull Larus fuscus | 1 | 1 | 0 |
| Yellow-legged Gull Larus michahellis | Lesser Black-backed Gull Larus fuscus | 1 | 0 | 1 |
| Caspian Tern Hydroprogne caspia | Whiskered Tern Chlidonias hybrida | 1 | 0 | 1 |
| Short-toed Eagle Circaetus gallicus | Greater Spotted Eagle Clanga clanga | 1 | 1 | 0 |
| Short-toed Eagle Circaetus gallicus | Hen Harrier Circus cyaneus | 1 | 1 | 0 |
| Montagu's Harrier Circus pygargus | Eurasian Goshawk Astur gentilis | 1 | 1 | 0 |
| Eurasian Sparrowhawk Accipiter nisus | Eurasian Goshawk Astur gentilis | 1 | 1 | 0 |
| Eurasian Goshawk Astur gentilis | Rough-legged Buzzard Buteo lagopus | 1 | 0 | 1 |
| Ural Owl Strix uralensis | Tengmalm's Owl Aegolius funereus | 1 | 0 | 1 |
| European Bee-eater Merops apiaster | European Roller Coracias garrulus | 1 | 1 | 0 |
| Marsh Tit Poecile palustris | Willow Tit Poecile montanus | 1 | 0 | 1 |
| Great Tit Parus major | Common Starling Sturnus vulgaris | 1 | 0 | 1 |
| Blyth's Reed Warbler Acrocephalus dumetorum | Common Reed Warbler Acrocephalus scirpaceus | 1 | 0 | 1 |
| Common Reed Warbler Acrocephalus scirpaceus | River Warbler Locustella fluviatilis | 1 | 0 | 1 |
| River Warbler Locustella fluviatilis | Savi's Warbler Locustella luscinioides | 1 | 0 | 1 |
| Wood Warbler Phylloscopus sibilatrix | Common Chiffchaff Phylloscopus collybita | 1 | 1 | 0 |
| Common Chiffchaff Phylloscopus collybita | Yellowhammer Emberiza citrinella | 1 | 1 | 0 |
| Greenish Warbler Phylloscopus trochiloides | Black Redstart Phoenicurus ochruros | 1 | 1 | 0 |
| Eurasian Blackcap Sylvia atricapilla | Black Redstart Phoenicurus ochruros | 1 | 1 | 0 |
| Goldcrest Regulus regulus | Eurasian Siskin Spinus spinus | 1 | 0 | 1 |
| Eurasian Blackbird Turdus merula | Fieldfare Turdus pilaris | 1 | 1 | 0 |
| Spotted Flycatcher Muscicapa striata | Thrush Nightingale Luscinia luscinia | 1 | 0 | 1 |
| Whinchat Saxicola rubetra | Northern Wheatear Oenanthe oenanthe | 1 | 1 | 0 |
| Whinchat Saxicola rubetra | Brambling Fringilla montifringilla | 1 | 0 | 1 |
| House Sparrow Passer domesticus | Eurasian Tree Sparrow Passer montanus | 1 | 1 | 0 |
| Meadow Pipit Anthus pratensis | Red-throated Pipit Anthus cervinus | 1 | 0 | 1 |
| Parrot Crossbill Loxia pytyopsittacus | Common Crossbill Loxia curvirostra | 1 | 1 | 0 |
| Lapland Bunting Calcarius lapponicus | Corn Bunting Emberiza calandra | 1 | 1 | 0 |
| Taiga Bean Goose Anser fabalis | Common Eider Somateria mollissima | 1 | 0 | 1 |
| Corn Bunting Emberiza calandra | Ortolan Bunting Emberiza hortulana | 1 | 1 | 0 |