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 Tit Poecile palustris | Great Tit Parus major | 7 | 3 | 4 |
| Eurasian Sparrowhawk Accipiter nisus | Eurasian Goshawk Astur gentilis | 7 | 4 | 3 |
| Bewick's Swan Cygnus columbianus | Whooper Swan Cygnus cygnus | 6 | 6 | 0 |
| House Sparrow Passer domesticus | Eurasian Tree Sparrow Passer montanus | 6 | 4 | 2 |
| Razorbill Alca torda | Common Guillemot Uria aalge | 6 | 3 | 3 |
| Crested Tit Lophophanes cristatus | Eurasian Blue Tit Cyanistes caeruleus | 6 | 2 | 4 |
| European Serin Serinus serinus | Eurasian Siskin Spinus spinus | 6 | 2 | 4 |
| Richard's Pipit Anthus richardi | Tree Pipit Anthus trivialis | 5 | 2 | 3 |
| Rough-legged Buzzard Buteo lagopus | Common Buzzard Buteo buteo | 5 | 5 | 0 |
| Cory's Shearwater Calonectris diomedea | Manx Shearwater Puffinus puffinus | 5 | 4 | 1 |
| Richard's Pipit Anthus richardi | Meadow Pipit Anthus pratensis | 5 | 4 | 1 |
| Common Redpoll Acanthis flammea | Lesser Redpoll Acanthis cabaret | 5 | 4 | 1 |
| Eurasian Treecreeper Certhia familiaris | Short-toed Treecreeper Certhia brachydactyla | 4 | 4 | 0 |
| Eurasian Jay Garrulus glandarius | Common Magpie Pica pica | 4 | 1 | 3 |
| Goosander Mergus merganser | Red-breasted Merganser Mergus serrator | 4 | 4 | 0 |
| Marsh Tit Poecile palustris | Eurasian Blue Tit Cyanistes caeruleus | 4 | 2 | 2 |
| Carrion Crow Corvus corone | Common Raven Corvus corax | 4 | 2 | 2 |
| Common Sandpiper Actitis hypoleucos | Wood Sandpiper Tringa glareola | 4 | 1 | 3 |
| Greater White-fronted Goose Anser albifrons | Lesser White-fronted Goose Anser erythropus | 4 | 0 | 4 |
| European Storm-Petrel Hydrobates pelagicus | Northern Fulmar Fulmarus glacialis | 4 | 2 | 2 |
| Velvet Scoter Melanitta fusca | Common Scoter Melanitta nigra | 4 | 3 | 1 |
| Coal Tit Periparus ater | Great Tit Parus major | 4 | 2 | 2 |
| Mistle Thrush Turdus viscivorus | Song Thrush Turdus philomelos | 4 | 4 | 0 |
| Wood Warbler Phylloscopus sibilatrix | Willow Warbler Phylloscopus trochilus | 4 | 4 | 0 |
| Wood Sandpiper Tringa glareola | Common Greenshank Tringa nebularia | 3 | 3 | 0 |
| Little Grebe Tachybaptus ruficollis | Red-necked Grebe Podiceps grisegena | 3 | 1 | 2 |
| Cory's Shearwater Calonectris diomedea | Sooty Shearwater Ardenna grisea | 3 | 2 | 1 |
| Little Egret Egretta garzetta | Great White Egret Ardea alba | 3 | 2 | 1 |
| Wood Warbler Phylloscopus sibilatrix | Common Chiffchaff Phylloscopus collybita | 3 | 1 | 2 |
| Sand Martin Riparia riparia | Western House Martin Delichon urbicum | 3 | 2 | 1 |
| Velvet Scoter Melanitta fusca | Long-tailed Duck Clangula hyemalis | 3 | 0 | 3 |
| Coal Tit Periparus ater | Marsh Tit Poecile palustris | 3 | 0 | 3 |
| Coal Tit Periparus ater | Eurasian Blue Tit Cyanistes caeruleus | 3 | 2 | 1 |
| Richard's Pipit Anthus richardi | Rock Pipit Anthus petrosus | 3 | 0 | 3 |
| Temminck's Stint Calidris temminckii | Dunlin Calidris alpina | 3 | 3 | 0 |
| Little Tern Sternula albifrons | Sandwich Tern Thalasseus sandvicensis | 3 | 0 | 3 |
| Sedge Warbler Acrocephalus schoenobaenus | Marsh Warbler Acrocephalus palustris | 3 | 2 | 1 |
| Sanderling Calidris alba | Little Stint Calidris minuta | 3 | 2 | 1 |
| Eurasian Scops Owl Otus scops | Little Owl Athene noctua | 3 | 2 | 1 |
| Water Pipit Anthus spinoletta | Rock Pipit Anthus petrosus | 3 | 3 | 0 |
| Water Rail Rallus aquaticus | Spotted Crake Porzana porzana | 3 | 2 | 1 |
| Tundra Bean Goose Anser serrirostris | Pink-footed Goose Anser brachyrhynchus | 3 | 3 | 0 |
| Leach's Storm-Petrel Hydrobates leucorhous | Cory's Shearwater Calonectris diomedea | 3 | 2 | 1 |
| Merlin Falco columbarius | Eurasian Hobby Falco subbuteo | 3 | 2 | 1 |
| Black Guillemot Cepphus grylle | Common Guillemot Uria aalge | 3 | 2 | 1 |
| Lesser Redpoll Acanthis cabaret | Arctic Redpoll Acanthis hornemanni | 3 | 2 | 1 |
| Rock Dove Columba livia | Stock Dove Columba oenas | 3 | 2 | 1 |
| Garden Warbler Sylvia borin | Lesser Whitethroat Curruca curruca | 3 | 1 | 2 |
| Herring Gull Larus argentatus | Lesser Black-backed Gull Larus fuscus | 3 | 0 | 3 |
| Grey Plover Pluvialis squatarola | European Golden Plover Pluvialis apricaria | 3 | 3 | 0 |
| Little Gull Hydrocoloeus minutus | Black-legged Kittiwake Rissa tridactyla | 2 | 1 | 1 |
| Little Gull Hydrocoloeus minutus | Sabine's Gull Xema sabini | 2 | 1 | 1 |
| Black-legged Kittiwake Rissa tridactyla | Sabine's Gull Xema sabini | 2 | 1 | 1 |
| Coal Tit Periparus ater | Crested Tit Lophophanes cristatus | 2 | 1 | 1 |
| Tawny Pipit Anthus campestris | Meadow Pipit Anthus pratensis | 2 | 1 | 1 |
| Tawny Pipit Anthus campestris | Tree Pipit Anthus trivialis | 2 | 1 | 1 |
| Crested Tit Lophophanes cristatus | Marsh Tit Poecile palustris | 2 | 1 | 1 |
| Meadow Pipit Anthus pratensis | Tree Pipit Anthus trivialis | 2 | 0 | 2 |
| Grey Phalarope Phalaropus fulicarius | Red-necked Phalarope Phalaropus lobatus | 2 | 1 | 1 |
| Crested Tit Lophophanes cristatus | Great Tit Parus major | 2 | 1 | 1 |
| Common Chaffinch Fringilla coelebs | Brambling Fringilla montifringilla | 2 | 0 | 2 |
| Eurasian Oystercatcher Haematopus ostralegus | Grey Plover Pluvialis squatarola | 2 | 2 | 0 |
| Common Sandpiper Actitis hypoleucos | Green Sandpiper Tringa ochropus | 2 | 0 | 2 |
| Twite Linaria flavirostris | Common Linnet Linaria cannabina | 2 | 2 | 0 |
| Shore Lark Eremophila alpestris | Woodlark Lullula arborea | 2 | 1 | 1 |
| Common Linnet Linaria cannabina | Common Redpoll Acanthis flammea | 2 | 0 | 2 |
| Common Linnet Linaria cannabina | Lesser Redpoll Acanthis cabaret | 2 | 0 | 2 |
| Woodlark Lullula arborea | Eurasian Skylark Alauda arvensis | 2 | 1 | 1 |
| Woodlark Lullula arborea | Crested Lark Galerida cristata | 2 | 2 | 0 |
| Eurasian Skylark Alauda arvensis | Crested Lark Galerida cristata | 2 | 2 | 0 |
| Parrot Crossbill Loxia pytyopsittacus | Two-barred Crossbill Loxia leucoptera | 2 | 0 | 2 |
| Common Crossbill Loxia curvirostra | Two-barred Crossbill Loxia leucoptera | 2 | 0 | 2 |
| Green Sandpiper Tringa ochropus | Wood Sandpiper Tringa glareola | 2 | 0 | 2 |
| Common Shelduck Tadorna tadorna | Garganey Spatula querquedula | 2 | 2 | 0 |
| Yellowhammer Emberiza citrinella | Ortolan Bunting Emberiza hortulana | 2 | 0 | 2 |
| Icterine Warbler Hippolais icterina | Marsh Warbler Acrocephalus palustris | 2 | 2 | 0 |
| Icterine Warbler Hippolais icterina | Sedge Warbler Acrocephalus schoenobaenus | 2 | 1 | 1 |
| Spotted Redshank Tringa erythropus | Common Greenshank Tringa nebularia | 2 | 2 | 0 |
| Spotted Redshank Tringa erythropus | Ruddy Turnstone Arenaria interpres | 2 | 1 | 1 |
| Sedge Warbler Acrocephalus schoenobaenus | Common Reed Warbler Acrocephalus scirpaceus | 2 | 2 | 0 |
| Marsh Warbler Acrocephalus palustris | Common Reed Warbler Acrocephalus scirpaceus | 2 | 2 | 0 |
| Little Grebe Tachybaptus ruficollis | Great Crested Grebe Podiceps cristatus | 2 | 2 | 0 |
| River Warbler Locustella fluviatilis | Common Grasshopper Warbler Locustella naevia | 2 | 1 | 1 |
| Savi's Warbler Locustella luscinioides | Common Grasshopper Warbler Locustella naevia | 2 | 2 | 0 |
| Arctic Tern Sterna paradisaea | Common Tern Sterna hirundo | 2 | 0 | 2 |
| Greater Scaup Aythya marila | Velvet Scoter Melanitta fusca | 2 | 2 | 0 |
| Black-throated Diver Gavia arctica | Great Northern Diver Gavia immer | 2 | 2 | 0 |
| Great Northern Diver Gavia immer | White-billed Diver Gavia adamsii | 2 | 2 | 0 |
| Common Shelduck Tadorna tadorna | Northern Shoveler Spatula clypeata | 2 | 1 | 1 |
| Eurasian Wigeon Mareca penelope | Common Goldeneye Bucephala clangula | 2 | 2 | 0 |
| Red Knot Calidris canutus | Curlew Sandpiper Calidris ferruginea | 2 | 0 | 2 |
| Willow Warbler Phylloscopus trochilus | Common Chiffchaff Phylloscopus collybita | 2 | 1 | 1 |
| Common Chiffchaff Phylloscopus collybita | Greenish Warbler Phylloscopus trochiloides | 2 | 0 | 2 |
| Broad-billed Sandpiper Calidris falcinellus | Curlew Sandpiper Calidris ferruginea | 2 | 2 | 0 |
| Curlew Sandpiper Calidris ferruginea | Sanderling Calidris alba | 2 | 2 | 0 |
| Curlew Sandpiper Calidris ferruginea | Dunlin Calidris alpina | 2 | 2 | 0 |
| Mallard Anas platyrhynchos | Northern Pintail Anas acuta | 2 | 1 | 1 |
| Eurasian/Green-winged Teal Anas crecca | Common Pochard Aythya ferina | 2 | 2 | 0 |
| Hen Harrier Circus cyaneus | Pallid Harrier Circus macrourus | 2 | 2 | 0 |
| Eurasian Curlew Numenius arquata | Black-tailed Godwit Limosa limosa | 2 | 2 | 0 |
| Eurasian Goshawk Astur gentilis | Red Kite Milvus milvus | 2 | 0 | 2 |
| Eurasian Goshawk Astur gentilis | Black Kite Milvus migrans | 2 | 0 | 2 |
| Dunlin Calidris alpina | Little Stint Calidris minuta | 2 | 0 | 2 |
| Mistle Thrush Turdus viscivorus | Fieldfare Turdus pilaris | 2 | 1 | 1 |
| Bar-tailed Godwit Limosa lapponica | Black-tailed Godwit Limosa limosa | 2 | 2 | 0 |
| Song Thrush Turdus philomelos | Redwing Turdus iliacus | 2 | 1 | 1 |
| Song Thrush Turdus philomelos | Eurasian Blackbird Turdus merula | 2 | 2 | 0 |
| Redwing Turdus iliacus | Fieldfare Turdus pilaris | 2 | 1 | 1 |
| Lesser White-fronted Goose Anser erythropus | Taiga Bean Goose Anser fabalis | 2 | 0 | 2 |
| Smew Mergellus albellus | Goosander Mergus merganser | 2 | 2 | 0 |
| Spotted Flycatcher Muscicapa striata | Thrush Nightingale Luscinia luscinia | 2 | 1 | 1 |
| Eurasian Woodcock Scolopax rusticola | Common Snipe Gallinago gallinago | 2 | 1 | 1 |
| American Barn Owl Tyto furcata | Little Owl Athene noctua | 2 | 1 | 1 |
| American Barn Owl Tyto furcata | Tawny Owl Strix aluco | 2 | 2 | 0 |
| Thrush Nightingale Luscinia luscinia | Common Nightingale Luscinia megarhynchos | 2 | 0 | 2 |
| Long-tailed Skua Stercorarius longicaudus | Great Skua Stercorarius skua | 2 | 2 | 0 |
| Little Owl Athene noctua | Tawny Owl Strix aluco | 2 | 0 | 2 |
| Red-breasted Flycatcher Ficedula parva | European Pied Flycatcher Ficedula hypoleuca | 2 | 1 | 1 |
| Common Pochard Aythya ferina | Tufted Duck Aythya fuligula | 2 | 1 | 1 |
| Red-backed Shrike Lanius collurio | Great Grey Shrike Lanius excubitor | 2 | 0 | 2 |
| Common Redstart Phoenicurus phoenicurus | Whinchat Saxicola rubetra | 2 | 1 | 1 |
| Whinchat Saxicola rubetra | European Stonechat Saxicola rubicola | 2 | 0 | 2 |
| Little Auk Alle alle | Common Guillemot Uria aalge | 2 | 0 | 2 |
| Rook Corvus frugilegus | Common Raven Corvus corax | 2 | 0 | 2 |
| Northern Wheatear Oenanthe oenanthe | Dunnock Prunella modularis | 2 | 0 | 2 |
| Dunnock Prunella modularis | Eurasian Tree Sparrow Passer montanus | 2 | 0 | 2 |
| American Barn Owl Tyto furcata | Eurasian Scops Owl Otus scops | 1 | 1 | 0 |
| Eurasian Scops Owl Otus scops | Tawny Owl Strix aluco | 1 | 1 | 0 |
| Common Kestrel Falco tinnunculus | Red-footed Falcon Falco vespertinus | 1 | 0 | 1 |
| Common Kestrel Falco tinnunculus | Merlin Falco columbarius | 1 | 1 | 0 |
| Merlin Falco columbarius | Peregrine Falcon Falco peregrinus | 1 | 1 | 0 |
| Eurasian Hobby Falco subbuteo | Peregrine Falcon Falco peregrinus | 1 | 1 | 0 |
| Red-backed Shrike Lanius collurio | Common Linnet Linaria cannabina | 1 | 1 | 0 |
| Eurasian Jackdaw Coloeus monedula | Rook Corvus frugilegus | 1 | 1 | 0 |
| Eurasian Jackdaw Coloeus monedula | Carrion Crow Corvus corone | 1 | 0 | 1 |
| Carrion Crow Corvus corone | Common Whitethroat Curruca communis | 1 | 0 | 1 |
| Hooded Crow Corvus cornix | Common Raven Corvus corax | 1 | 1 | 0 |
| Hooded Crow Corvus cornix | Fieldfare Turdus pilaris | 1 | 0 | 1 |
| Common Raven Corvus corax | Brambling Fringilla montifringilla | 1 | 0 | 1 |
| Crested Tit Lophophanes cristatus | Willow Tit Poecile montanus | 1 | 1 | 0 |
| Marsh Tit Poecile palustris | Eurasian Bullfinch Pyrrhula pyrrhula | 1 | 0 | 1 |
| Eurasian Blue Tit Cyanistes caeruleus | Great Tit Parus major | 1 | 1 | 0 |
| Great Tit Parus major | Eurasian Skylark Alauda arvensis | 1 | 0 | 1 |
| Eurasian Skylark Alauda arvensis | Barn Swallow Hirundo rustica | 1 | 0 | 1 |
| Eurasian Skylark Alauda arvensis | Eurasian Siskin Spinus spinus | 1 | 1 | 0 |
| Eurasian Skylark Alauda arvensis | Corn Bunting Emberiza calandra | 1 | 1 | 0 |
| Crested Lark Galerida cristata | Northern Wheatear Oenanthe oenanthe | 1 | 0 | 1 |
| Crested Lark Galerida cristata | Richard's Pipit Anthus richardi | 1 | 0 | 1 |
| Bearded Tit Panurus biarmicus | Lesser Whitethroat Curruca curruca | 1 | 0 | 1 |
| Melodious Warbler Hippolais polyglotta | Icterine Warbler Hippolais icterina | 1 | 1 | 0 |
| Icterine Warbler Hippolais icterina | Common Reed Warbler Acrocephalus scirpaceus | 1 | 1 | 0 |
| Icterine Warbler Hippolais icterina | Common Redpoll Acanthis flammea | 1 | 0 | 1 |
| Common Reed Warbler Acrocephalus scirpaceus | Great Reed Warbler Acrocephalus arundinaceus | 1 | 0 | 1 |
| Great Reed Warbler Acrocephalus arundinaceus | River Warbler Locustella fluviatilis | 1 | 0 | 1 |
| Eurasian Crag Martin Ptyonoprogne rupestris | Rufous-chested Swallow Cecropis semirufa | 1 | 0 | 1 |
| Barn Swallow Hirundo rustica | Western House Martin Delichon urbicum | 1 | 0 | 1 |
| Barn Swallow Hirundo rustica | Red-rumped Swallow Cecropis daurica | 1 | 1 | 0 |
| Barn Swallow Hirundo rustica | Fieldfare Turdus pilaris | 1 | 1 | 0 |
| Barn Swallow Hirundo rustica | Common Chaffinch Fringilla coelebs | 1 | 0 | 1 |
| Wood Warbler Phylloscopus sibilatrix | Yellow-browed Warbler Phylloscopus inornatus | 1 | 1 | 0 |
| Pallas's Warbler Phylloscopus proregulus | Willow Warbler Phylloscopus trochilus | 1 | 0 | 1 |
| Pallas's Warbler Phylloscopus proregulus | Common Chiffchaff Phylloscopus collybita | 1 | 1 | 0 |
| Greenish Warbler Phylloscopus trochiloides | Long-tailed Tit Aegithalos caudatus | 1 | 0 | 1 |
| Two-barred Warbler Phylloscopus plumbeitarsus | Barred Warbler Curruca nisoria | 1 | 0 | 1 |
| Long-tailed Tit Aegithalos caudatus | Garden Warbler Sylvia borin | 1 | 0 | 1 |
| Garden Warbler Sylvia borin | Barred Warbler Curruca nisoria | 1 | 0 | 1 |
| Garden Warbler Sylvia borin | Common Nightingale Luscinia megarhynchos | 1 | 0 | 1 |
| Lesser Whitethroat Curruca curruca | Common Whitethroat Curruca communis | 1 | 1 | 0 |
| Lesser Whitethroat Curruca curruca | Collared Flycatcher Ficedula albicollis | 1 | 1 | 0 |
| Common Whitethroat Curruca communis | Eurasian Nuthatch Sitta europaea | 1 | 0 | 1 |
| Common Whitethroat Curruca communis | Twite Linaria flavirostris | 1 | 0 | 1 |
| Goldcrest Regulus regulus | Common Firecrest Regulus ignicapilla | 1 | 0 | 1 |
| Goldcrest Regulus regulus | Eurasian Treecreeper Certhia familiaris | 1 | 0 | 1 |
| Goldcrest Regulus regulus | Arctic Redpoll Acanthis hornemanni | 1 | 0 | 1 |
| Common Firecrest Regulus ignicapilla | Black-throated Accentor Prunella atrogularis | 1 | 0 | 1 |
| Eurasian Nuthatch Sitta europaea | Eurasian Treecreeper Certhia familiaris | 1 | 1 | 0 |
| Eurasian Nuthatch Sitta europaea | Short-toed Treecreeper Certhia brachydactyla | 1 | 1 | 0 |
| Short-toed Treecreeper Certhia brachydactyla | Common Starling Sturnus vulgaris | 1 | 1 | 0 |
| Short-toed Treecreeper Certhia brachydactyla | Rock Pipit Anthus petrosus | 1 | 0 | 1 |
| Eurasian Wren Troglodytes troglodytes | Snow Bunting Plectrophenax nivalis | 1 | 0 | 1 |
| Mistle Thrush Turdus viscivorus | Redwing Turdus iliacus | 1 | 0 | 1 |
| Mistle Thrush Turdus viscivorus | Eurasian Blackbird Turdus merula | 1 | 0 | 1 |
| Mistle Thrush Turdus viscivorus | Ring Ouzel Turdus torquatus | 1 | 0 | 1 |
| Eurasian Blackbird Turdus merula | Rock Pipit Anthus petrosus | 1 | 1 | 0 |
| Fieldfare Turdus pilaris | European Greenfinch Chloris chloris | 1 | 0 | 1 |
| Fieldfare Turdus pilaris | Common Linnet Linaria cannabina | 1 | 0 | 1 |
| Spotted Flycatcher Muscicapa striata | Common Nightingale Luscinia megarhynchos | 1 | 1 | 0 |
| Spotted Flycatcher Muscicapa striata | Bluethroat Luscinia svecica | 1 | 1 | 0 |
| European Robin Erithacus rubecula | Collared Flycatcher Ficedula albicollis | 1 | 1 | 0 |
| Thrush Nightingale Luscinia luscinia | Red-breasted Flycatcher Ficedula parva | 1 | 1 | 0 |
| Thrush Nightingale Luscinia luscinia | Bohemian Waxwing Bombycilla garrulus | 1 | 1 | 0 |
| Common Nightingale Luscinia megarhynchos | Bluethroat Luscinia svecica | 1 | 0 | 1 |
| Common Nightingale Luscinia megarhynchos | Red-breasted Flycatcher Ficedula parva | 1 | 0 | 1 |
| Common Nightingale Luscinia megarhynchos | Collared Flycatcher Ficedula albicollis | 1 | 1 | 0 |
| Red-breasted Flycatcher Ficedula parva | Collared Flycatcher Ficedula albicollis | 1 | 1 | 0 |
| European Pied Flycatcher Ficedula hypoleuca | Collared Flycatcher Ficedula albicollis | 1 | 1 | 0 |
| Collared Flycatcher Ficedula albicollis | European Stonechat Saxicola rubicola | 1 | 0 | 1 |
| Common Redstart Phoenicurus phoenicurus | Black Redstart Phoenicurus ochruros | 1 | 0 | 1 |
| Black Redstart Phoenicurus ochruros | Whinchat Saxicola rubetra | 1 | 1 | 0 |
| Black Redstart Phoenicurus ochruros | Northern Wheatear Oenanthe oenanthe | 1 | 1 | 0 |
| Whinchat Saxicola rubetra | Northern Wheatear Oenanthe oenanthe | 1 | 1 | 0 |
| European Stonechat Saxicola rubicola | Siberian Stonechat Saxicola maurus | 1 | 0 | 1 |
| European Stonechat Saxicola rubicola | Bohemian Waxwing Bombycilla garrulus | 1 | 0 | 1 |
| European Stonechat Saxicola rubicola | Dunnock Prunella modularis | 1 | 1 | 0 |
| Dunnock Prunella modularis | Grey Wagtail Motacilla cinerea | 1 | 1 | 0 |
| House Sparrow Passer domesticus | Pied Wagtail/White Wagtail Motacilla alba | 1 | 0 | 1 |
| Grey Wagtail Motacilla cinerea | Pied Wagtail/White Wagtail Motacilla alba | 1 | 0 | 1 |
| Western Yellow Wagtail Motacilla flava | Meadow Pipit Anthus pratensis | 1 | 0 | 1 |
| Pied Wagtail/White Wagtail Motacilla alba | Meadow Pipit Anthus pratensis | 1 | 1 | 0 |
| Pied Wagtail/White Wagtail Motacilla alba | Tree Pipit Anthus trivialis | 1 | 1 | 0 |
| Pied Wagtail/White Wagtail Motacilla alba | Rock Pipit Anthus petrosus | 1 | 0 | 1 |
| Pied Wagtail/White Wagtail Motacilla alba | Eurasian Siskin Spinus spinus | 1 | 0 | 1 |
| Tawny Pipit Anthus campestris | Red-throated Pipit Anthus cervinus | 1 | 1 | 0 |
| Meadow Pipit Anthus pratensis | Red-throated Pipit Anthus cervinus | 1 | 0 | 1 |
| Meadow Pipit Anthus pratensis | Rock Pipit Anthus petrosus | 1 | 0 | 1 |
| Red-throated Pipit Anthus cervinus | Water Pipit Anthus spinoletta | 1 | 1 | 0 |
| Red-throated Pipit Anthus cervinus | Rock Pipit Anthus petrosus | 1 | 1 | 0 |
| Water Pipit Anthus spinoletta | Common Chaffinch Fringilla coelebs | 1 | 1 | 0 |
| Brambling Fringilla montifringilla | Hawfinch Coccothraustes coccothraustes | 1 | 1 | 0 |
| Brambling Fringilla montifringilla | Common Rosefinch Carpodacus erythrinus | 1 | 1 | 0 |
| European Greenfinch Chloris chloris | Common Linnet Linaria cannabina | 1 | 1 | 0 |
| Twite Linaria flavirostris | Common Redpoll Acanthis flammea | 1 | 1 | 0 |
| Common Redpoll Acanthis flammea | Arctic Redpoll Acanthis hornemanni | 1 | 1 | 0 |
| Lesser Redpoll Acanthis cabaret | Eurasian Siskin Spinus spinus | 1 | 0 | 1 |
| Arctic Redpoll Acanthis hornemanni | Two-barred Crossbill Loxia leucoptera | 1 | 1 | 0 |
| Parrot Crossbill Loxia pytyopsittacus | Common Crossbill Loxia curvirostra | 1 | 0 | 1 |
| Common Crossbill Loxia curvirostra | Eurasian Siskin Spinus spinus | 1 | 0 | 1 |
| Two-barred Crossbill Loxia leucoptera | European Goldfinch Carduelis carduelis | 1 | 1 | 0 |
| Two-barred Crossbill Loxia leucoptera | Eurasian Siskin Spinus spinus | 1 | 0 | 1 |
| Lapland Bunting Calcarius lapponicus | Corn Bunting Emberiza calandra | 1 | 1 | 0 |
| Snow Bunting Plectrophenax nivalis | Ortolan Bunting Emberiza hortulana | 1 | 1 | 0 |
| Snow Bunting Plectrophenax nivalis | Common Reed Bunting Emberiza schoeniclus | 1 | 0 | 1 |
| Greylag Goose Anser anser | Taiga Bean Goose Anser fabalis | 1 | 1 | 0 |
| Yellow-browed Bunting Emberiza chrysophrys | White-throated Sparrow Zonotrichia albicollis | 1 | 0 | 1 |
| Greylag Goose Anser anser | Mallard Anas platyrhynchos | 1 | 0 | 1 |
| Greater White-fronted Goose Anser albifrons | Taiga Bean Goose Anser fabalis | 1 | 1 | 0 |
| Greater White-fronted Goose Anser albifrons | Tundra Bean Goose Anser serrirostris | 1 | 1 | 0 |
| Lesser White-fronted Goose Anser erythropus | Tundra Bean Goose Anser serrirostris | 1 | 0 | 1 |
| Taiga Bean Goose Anser fabalis | Pink-footed Goose Anser brachyrhynchus | 1 | 1 | 0 |
| Tundra Bean Goose Anser serrirostris | Brent Goose Branta bernicla | 1 | 0 | 1 |
| Tundra Bean Goose Anser serrirostris | Barnacle Goose Branta leucopsis | 1 | 1 | 0 |
| Pink-footed Goose Anser brachyrhynchus | Barnacle Goose Branta leucopsis | 1 | 1 | 0 |
| Pink-footed Goose Anser brachyrhynchus | Common Scoter Melanitta nigra | 1 | 0 | 1 |
| Brent Goose Branta bernicla | Mute Swan Cygnus olor | 1 | 1 | 0 |
| Barnacle Goose Branta leucopsis | Velvet Scoter Melanitta fusca | 1 | 1 | 0 |
| Mute Swan Cygnus olor | Eurasian Wigeon Mareca penelope | 1 | 1 | 0 |
| Whooper Swan Cygnus cygnus | Ruddy Shelduck Tadorna ferruginea | 1 | 1 | 0 |
| Whooper Swan Cygnus cygnus | Great Cormorant Phalacrocorax carbo | 1 | 0 | 1 |
| Ruddy Shelduck Tadorna ferruginea | Common Shelduck Tadorna tadorna | 1 | 0 | 1 |
| Ruddy Shelduck Tadorna ferruginea | Garganey Spatula querquedula | 1 | 1 | 0 |
| Common Shelduck Tadorna tadorna | Herring Gull Larus argentatus | 1 | 1 | 0 |
| Garganey Spatula querquedula | Gadwall Mareca strepera | 1 | 1 | 0 |
| Northern Shoveler Spatula clypeata | Velvet Scoter Melanitta fusca | 1 | 0 | 1 |
| Gadwall Mareca strepera | Mallard Anas platyrhynchos | 1 | 1 | 0 |
| Gadwall Mareca strepera | Northern Pintail Anas acuta | 1 | 1 | 0 |
| Eurasian Wigeon Mareca penelope | Eurasian/Green-winged Teal Anas crecca | 1 | 1 | 0 |
| Eurasian/Green-winged Teal Anas crecca | Eurasian Jackdaw Coloeus monedula | 1 | 1 | 0 |
| Red-crested Pochard Netta rufina | Common Pochard Aythya ferina | 1 | 0 | 1 |
| Common Pochard Aythya ferina | Greater Scaup Aythya marila | 1 | 1 | 0 |
| Tufted Duck Aythya fuligula | Velvet Scoter Melanitta fusca | 1 | 1 | 0 |
| Tufted Duck Aythya fuligula | Great Spotted Woodpecker Dendrocopos major | 1 | 1 | 0 |
| King Eider Somateria spectabilis | Common Eider Somateria mollissima | 1 | 0 | 1 |
| Common Eider Somateria mollissima | Ring Ouzel Turdus torquatus | 1 | 0 | 1 |
| Long-tailed Duck Clangula hyemalis | Smew Mergellus albellus | 1 | 1 | 0 |
| Common Goldeneye Bucephala clangula | Smew Mergellus albellus | 1 | 1 | 0 |
| Common Goldeneye Bucephala clangula | Goosander Mergus merganser | 1 | 1 | 0 |
| Smew Mergellus albellus | Red-breasted Merganser Mergus serrator | 1 | 0 | 1 |
| Smew Mergellus albellus | Black Grouse Lyrurus tetrix | 1 | 1 | 0 |
| Red-breasted Merganser Mergus serrator | Snow Bunting Plectrophenax nivalis | 1 | 0 | 1 |
| Common Quail Coturnix coturnix | Ruff Calidris pugnax | 1 | 0 | 1 |
| Little Grebe Tachybaptus ruficollis | Slavonian Grebe Podiceps auritus | 1 | 0 | 1 |
| Slavonian Grebe Podiceps auritus | Black-necked Grebe Podiceps nigricollis | 1 | 1 | 0 |
| Red-necked Grebe Podiceps grisegena | Great Crested Grebe Podiceps cristatus | 1 | 0 | 1 |
| Red-necked Grebe Podiceps grisegena | Wood Warbler Phylloscopus sibilatrix | 1 | 1 | 0 |
| Great Crested Grebe Podiceps cristatus | Black-necked Grebe Podiceps nigricollis | 1 | 0 | 1 |
| Rock Dove Columba livia | European Turtle Dove Streptopelia turtur | 1 | 0 | 1 |
| Stock Dove Columba oenas | Common Woodpigeon Columba palumbus | 1 | 0 | 1 |
| Common Woodpigeon Columba palumbus | Eurasian Tree Sparrow Passer montanus | 1 | 1 | 0 |
| Common Cuckoo Cuculus canorus | Eurasian Nightjar Caprimulgus europaeus | 1 | 0 | 1 |
| Pacific Swift Apus pacificus | Little Swift Apus affinis | 1 | 1 | 0 |
| Water Rail Rallus aquaticus | Curlew Sandpiper Calidris ferruginea | 1 | 0 | 1 |
| Corncrake Crex crex | Spotted Crake Porzana porzana | 1 | 1 | 0 |
| Common Crane Grus grus | Ruff Calidris pugnax | 1 | 1 | 0 |
| Pied Avocet Recurvirostra avosetta | European Golden Plover Pluvialis apricaria | 1 | 1 | 0 |
| Eurasian Oystercatcher Haematopus ostralegus | Manx Shearwater Puffinus puffinus | 1 | 0 | 1 |
| Eurasian Oystercatcher Haematopus ostralegus | Common Raven Corvus corax | 1 | 0 | 1 |
| Grey Plover Pluvialis squatarola | Pacific Golden Plover Pluvialis fulva | 1 | 1 | 0 |
| European Golden Plover Pluvialis apricaria | Common Ringed Plover Charadrius hiaticula | 1 | 1 | 0 |
| Eurasian Dotterel Eudromias morinellus | Little Ringed Plover Thinornis dubius | 1 | 1 | 0 |
| Little Ringed Plover Thinornis dubius | Kentish Plover Anarhynchus alexandrinus | 1 | 0 | 1 |
| Northern Lapwing Vanellus vanellus | Great Northern Diver Gavia immer | 1 | 0 | 1 |
| Whimbrel Numenius phaeopus | Eurasian Curlew Numenius arquata | 1 | 0 | 1 |
| Whimbrel Numenius phaeopus | Black-tailed Godwit Limosa limosa | 1 | 1 | 0 |
| Whimbrel Numenius phaeopus | Eurasian Woodcock Scolopax rusticola | 1 | 1 | 0 |
| Whimbrel Numenius phaeopus | Spotted Redshank Tringa erythropus | 1 | 1 | 0 |
| Whimbrel Numenius phaeopus | Common Guillemot Uria aalge | 1 | 1 | 0 |
| Bar-tailed Godwit Limosa lapponica | Jack Snipe Lymnocryptes minimus | 1 | 1 | 0 |
| Eurasian Woodcock Scolopax rusticola | Great Snipe Gallinago media | 1 | 0 | 1 |
| Great Snipe Gallinago media | Common Snipe Gallinago gallinago | 1 | 1 | 0 |
| Great Snipe Gallinago media | Grey Phalarope Phalaropus fulicarius | 1 | 1 | 0 |
| Great Snipe Gallinago media | Red-necked Phalarope Phalaropus lobatus | 1 | 1 | 0 |
| Great Snipe Gallinago media | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Great Snipe Gallinago media | Common Tern Sterna hirundo | 1 | 1 | 0 |
| Grey Phalarope Phalaropus fulicarius | Common Sandpiper Actitis hypoleucos | 1 | 0 | 1 |
| Common Sandpiper Actitis hypoleucos | Sanderling Calidris alba | 1 | 1 | 0 |
| Green Sandpiper Tringa ochropus | Spotted Redshank Tringa erythropus | 1 | 1 | 0 |
| Green Sandpiper Tringa ochropus | Goldcrest Regulus regulus | 1 | 1 | 0 |
| Wood Sandpiper Tringa glareola | Sanderling Calidris alba | 1 | 0 | 1 |
| Common Greenshank Tringa nebularia | Ruff Calidris pugnax | 1 | 1 | 0 |
| Common Greenshank Tringa nebularia | Dunlin Calidris alpina | 1 | 0 | 1 |
| Ruddy Turnstone Arenaria interpres | Broad-billed Sandpiper Calidris falcinellus | 1 | 1 | 0 |
| Red Knot Calidris canutus | Ruff Calidris pugnax | 1 | 0 | 1 |
| Ruff Calidris pugnax | Temminck's Stint Calidris temminckii | 1 | 1 | 0 |
| Curlew Sandpiper Calidris ferruginea | Temminck's Stint Calidris temminckii | 1 | 1 | 0 |
| Temminck's Stint Calidris temminckii | Sanderling Calidris alba | 1 | 1 | 0 |
| Sanderling Calidris alba | Dunlin Calidris alpina | 1 | 0 | 1 |
| Sanderling Calidris alba | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Dunlin Calidris alpina | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Purple Sandpiper Calidris maritima | Little Stint Calidris minuta | 1 | 1 | 0 |
| Purple Sandpiper Calidris maritima | Arctic Skua Stercorarius parasiticus | 1 | 1 | 0 |
| Oriental Pratincole Glareola maldivarum | Black-winged Pratincole Glareola nordmanni | 1 | 1 | 0 |
| Long-tailed Skua Stercorarius longicaudus | Arctic Skua Stercorarius parasiticus | 1 | 0 | 1 |
| Long-tailed Skua Stercorarius longicaudus | Garden Warbler Sylvia borin | 1 | 0 | 1 |
| Great Skua Stercorarius skua | Razorbill Alca torda | 1 | 1 | 0 |
| Black Guillemot Cepphus grylle | European Goldfinch Carduelis carduelis | 1 | 1 | 0 |
| Common Guillemot Uria aalge | Manx Shearwater Puffinus puffinus | 1 | 0 | 1 |
| Little Gull Hydrocoloeus minutus | Black-headed Gull Chroicocephalus ridibundus | 1 | 1 | 0 |
| Sabine's Gull Xema sabini | Mediterranean Gull Ichthyaetus melanocephalus | 1 | 0 | 1 |
| Sabine's Gull Xema sabini | Herring Gull Larus argentatus | 1 | 1 | 0 |
| Black-headed Gull Chroicocephalus ridibundus | Audouin's Gull Ichthyaetus audouinii | 1 | 1 | 0 |
| Black-headed Gull Chroicocephalus ridibundus | Mediterranean Gull Ichthyaetus melanocephalus | 1 | 1 | 0 |
| Mediterranean Gull Ichthyaetus melanocephalus | Caspian Gull Larus cachinnans | 1 | 1 | 0 |
| Herring Gull Larus argentatus | Yellow-legged Gull Larus michahellis | 1 | 0 | 1 |
| Herring Gull Larus argentatus | Glaucous Gull Larus hyperboreus | 1 | 1 | 0 |
| Yellow-legged Gull Larus michahellis | Great Black-backed Gull Larus marinus | 1 | 0 | 1 |
| Great Black-backed Gull Larus marinus | Lesser Black-backed Gull Larus fuscus | 1 | 0 | 1 |
| Glaucous Gull Larus hyperboreus | Lesser Black-backed Gull Larus fuscus | 1 | 1 | 0 |
| Glaucous Gull Larus hyperboreus | Glaucous-winged Gull Larus glaucescens | 1 | 0 | 1 |
| Little Tern Sternula albifrons | Common Tern Sterna hirundo | 1 | 1 | 0 |
| Black Tern Chlidonias niger | Arctic Tern Sterna paradisaea | 1 | 0 | 1 |
| Common Tern Sterna hirundo | Sandwich Tern Thalasseus sandvicensis | 1 | 1 | 0 |
| European Storm-Petrel Hydrobates pelagicus | Leach's Storm-Petrel Hydrobates leucorhous | 1 | 0 | 1 |
| European Storm-Petrel Hydrobates pelagicus | Cory's Shearwater Calonectris diomedea | 1 | 0 | 1 |
| Leach's Storm-Petrel Hydrobates leucorhous | Northern Fulmar Fulmarus glacialis | 1 | 1 | 0 |
| Leach's Storm-Petrel Hydrobates leucorhous | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Leach's Storm-Petrel Hydrobates leucorhous | Manx Shearwater Puffinus puffinus | 1 | 1 | 0 |
| Northern Fulmar Fulmarus glacialis | Manx Shearwater Puffinus puffinus | 1 | 1 | 0 |
| Little Egret Egretta garzetta | Grey Heron Ardea cinerea | 1 | 0 | 1 |
| European Honey-buzzard Pernis apivorus | Golden Eagle Aquila chrysaetos | 1 | 1 | 0 |
| European Honey-buzzard Pernis apivorus | Western Marsh Harrier Circus aeruginosus | 1 | 1 | 0 |
| European Honey-buzzard Pernis apivorus | Hen Harrier Circus cyaneus | 1 | 0 | 1 |
| Western Marsh Harrier Circus aeruginosus | Hen Harrier Circus cyaneus | 1 | 0 | 1 |
| Western Marsh Harrier Circus aeruginosus | Red Kite Milvus milvus | 1 | 1 | 0 |
| Hen Harrier Circus cyaneus | Montagu's Harrier Circus pygargus | 1 | 0 | 1 |
| Eurasian Sparrowhawk Accipiter nisus | Red Kite Milvus milvus | 1 | 0 | 1 |
| Eurasian Goshawk Astur gentilis | Rough-legged Buzzard Buteo lagopus | 1 | 1 | 0 |
| Red Kite Milvus milvus | Black Kite Milvus migrans | 1 | 0 | 1 |
| Red Kite Milvus milvus | Rough-legged Buzzard Buteo lagopus | 1 | 1 | 0 |
| White-tailed Eagle Haliaeetus albicilla | Rough-legged Buzzard Buteo lagopus | 1 | 1 | 0 |