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 |
|---|---|---|---|---|
| Whinchat Saxicola rubetra | European Stonechat Saxicola rubicola | 3 | 0 | 3 |
| European Pied Flycatcher Ficedula hypoleuca | Collared Flycatcher Ficedula albicollis | 2 | 0 | 2 |
| Western Capercaillie Tetrao urogallus | Rock Partridge Alectoris graeca | 2 | 2 | 0 |
| Tundra Bean Goose Anser serrirostris | Pink-footed Goose Anser brachyrhynchus | 1 | 1 | 0 |
| Eurasian Wigeon Mareca penelope | Eurasian/Green-winged Teal Anas crecca | 1 | 1 | 0 |
| Mallard Anas platyrhynchos | Common Crossbill Loxia curvirostra | 1 | 0 | 1 |
| Little Grebe Tachybaptus ruficollis | Great Crested Grebe Podiceps cristatus | 1 | 1 | 0 |
| European Turtle Dove Streptopelia turtur | Collared Dove Streptopelia decaocto | 1 | 0 | 1 |
| Great Bustard Otis tarda | Little Bustard Tetrax tetrax | 1 | 0 | 1 |
| Northern Lapwing Vanellus vanellus | Common Crossbill Loxia curvirostra | 1 | 1 | 0 |
| Black-tailed Godwit Limosa limosa | Common Redshank Tringa totanus | 1 | 0 | 1 |
| Eurasian Woodcock Scolopax rusticola | Common Snipe Gallinago gallinago | 1 | 1 | 0 |
| Wood Sandpiper Tringa glareola | Common Greenshank Tringa nebularia | 1 | 1 | 0 |
| Buff-breasted Sandpiper Calidris subruficollis | Sanderling Calidris alba | 1 | 1 | 0 |
| Black-headed Gull Chroicocephalus ridibundus | Common Gull Larus canus | 1 | 0 | 1 |
| Herring Gull Larus argentatus | Great Black-backed Gull Larus marinus | 1 | 0 | 1 |
| Eurasian Spoonbill Platalea leucorodia | Common Buzzard Buteo buteo | 1 | 1 | 0 |
| Western Marsh Harrier Circus aeruginosus | Common Reed Bunting Emberiza schoeniclus | 1 | 1 | 0 |
| Eurasian Sparrowhawk Accipiter nisus | Eurasian Three-toed Woodpecker Picoides tridactylus | 1 | 1 | 0 |
| Eurasian Sparrowhawk Accipiter nisus | Grey Wagtail Motacilla cinerea | 1 | 0 | 1 |
| Eurasian Goshawk Astur gentilis | Rough-legged Buzzard Buteo lagopus | 1 | 0 | 1 |
| American Barn Owl Tyto furcata | Eurasian Three-toed Woodpecker Picoides tridactylus | 1 | 1 | 0 |
| Eurasian Eagle Owl Bubo bubo | Tengmalm's Owl Aegolius funereus | 1 | 0 | 1 |
| Tawny Owl Strix aluco | Tengmalm's Owl Aegolius funereus | 1 | 0 | 1 |
| Great Spotted Woodpecker Dendrocopos major | Syrian Woodpecker Dendrocopos syriacus | 1 | 0 | 1 |
| Red-backed Shrike Lanius collurio | Great Grey Shrike Lanius excubitor | 1 | 0 | 1 |
| Spotted Nutcracker Nucifraga caryocatactes | Coal Tit Periparus ater | 1 | 0 | 1 |
| Alpine Chough Pyrrhocorax graculus | Coal Tit Periparus ater | 1 | 0 | 1 |
| Alpine Chough Pyrrhocorax graculus | Common Starling Sturnus vulgaris | 1 | 0 | 1 |
| Alpine Chough Pyrrhocorax graculus | Fieldfare Turdus pilaris | 1 | 0 | 1 |
| Carrion Crow Corvus corone | Common Raven Corvus corax | 1 | 0 | 1 |
| Coal Tit Periparus ater | Eurasian Blackcap Sylvia atricapilla | 1 | 0 | 1 |
| Crested Tit Lophophanes cristatus | Willow Tit Poecile montanus | 1 | 0 | 1 |
| Greater Short-toed Lark Calandrella brachydactyla | Bimaculated Lark Melanocorypha bimaculata | 1 | 1 | 0 |
| Greater Short-toed Lark Calandrella brachydactyla | Eurasian Skylark Alauda arvensis | 1 | 1 | 0 |
| Greater Short-toed Lark Calandrella brachydactyla | Meadow Pipit Anthus pratensis | 1 | 0 | 1 |
| Turkestan Short-toed Lark Alaudala heinei | Meadow Pipit Anthus pratensis | 1 | 1 | 0 |
| Woodlark Lullula arborea | European Robin Erithacus rubecula | 1 | 1 | 0 |
| Moustached Warbler Acrocephalus melanopogon | Common Reed Warbler Acrocephalus scirpaceus | 1 | 0 | 1 |
| Moustached Warbler Acrocephalus melanopogon | Bohemian Waxwing Bombycilla garrulus | 1 | 0 | 1 |
| Common Reed Warbler Acrocephalus scirpaceus | Great Reed Warbler Acrocephalus arundinaceus | 1 | 0 | 1 |
| Common Reed Warbler Acrocephalus scirpaceus | Savi's Warbler Locustella luscinioides | 1 | 0 | 1 |
| Common Grasshopper Warbler Locustella naevia | Northern Wheatear Oenanthe oenanthe | 1 | 0 | 1 |
| Barn Swallow Hirundo rustica | Common Chaffinch Fringilla coelebs | 1 | 0 | 1 |
| Barn Swallow Hirundo rustica | Common Crossbill Loxia curvirostra | 1 | 0 | 1 |
| Western House Martin Delichon urbicum | European Goldfinch Carduelis carduelis | 1 | 1 | 0 |
| Wood Warbler Phylloscopus sibilatrix | Western Bonelli's Warbler Phylloscopus bonelli | 1 | 0 | 1 |
| Common Chiffchaff Phylloscopus collybita | Goldcrest Regulus regulus | 1 | 0 | 1 |
| Goldcrest Regulus regulus | Eurasian Siskin Spinus spinus | 1 | 1 | 0 |
| Common Firecrest Regulus ignicapilla | Redwing Turdus iliacus | 1 | 1 | 0 |
| Eurasian Treecreeper Certhia familiaris | Short-toed Treecreeper Certhia brachydactyla | 1 | 0 | 1 |
| Common Starling Sturnus vulgaris | Common Crossbill Loxia curvirostra | 1 | 0 | 1 |
| Redwing Turdus iliacus | Common Redstart Phoenicurus phoenicurus | 1 | 0 | 1 |
| Fieldfare Turdus pilaris | Brambling Fringilla montifringilla | 1 | 0 | 1 |
| Common Nightingale Luscinia megarhynchos | European Pied Flycatcher Ficedula hypoleuca | 1 | 0 | 1 |
| European Pied Flycatcher Ficedula hypoleuca | Northern Wheatear Oenanthe oenanthe | 1 | 0 | 1 |
| Collared Flycatcher Ficedula albicollis | Whinchat Saxicola rubetra | 1 | 0 | 1 |
| Bohemian Waxwing Bombycilla garrulus | Dunnock Prunella modularis | 1 | 1 | 0 |
| House Sparrow Passer domesticus | White-winged Snowfinch Montifringilla nivalis | 1 | 0 | 1 |
| Eurasian Tree Sparrow Passer montanus | Common Chaffinch Fringilla coelebs | 1 | 1 | 0 |
| Meadow Pipit Anthus pratensis | Water Pipit Anthus spinoletta | 1 | 0 | 1 |
| Common Chaffinch Fringilla coelebs | Eurasian Siskin Spinus spinus | 1 | 0 | 1 |
| Common Rosefinch Carpodacus erythrinus | Eurasian Bullfinch Pyrrhula pyrrhula | 1 | 0 | 1 |
| Common Redpoll Acanthis flammea | Lesser Redpoll Acanthis cabaret | 1 | 0 | 1 |
| Citril Finch Carduelis citrinella | European Serin Serinus serinus | 1 | 1 | 0 |
| Citril Finch Carduelis citrinella | Eurasian Siskin Spinus spinus | 1 | 0 | 1 |
| Greylag Goose Anser anser | Greater White-fronted Goose Anser albifrons | 1 | 0 | 1 |
| Citril Finch Carduelis citrinella | Yellowhammer Emberiza citrinella | 1 | 0 | 1 |
| Greylag Goose Anser anser | Tundra Bean Goose Anser serrirostris | 1 | 0 | 1 |
| Greater White-fronted Goose Anser albifrons | Common Raven Corvus corax | 1 | 0 | 1 |