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 |
|---|---|---|---|---|
| Common Redpoll Acanthis flammea | Arctic Redpoll Acanthis hornemanni | 3 | 1 | 2 |
| Brent Goose Branta bernicla | Barnacle Goose Branta leucopsis | 2 | 1 | 1 |
| Grey Phalarope Phalaropus fulicarius | Red-necked Phalarope Phalaropus lobatus | 2 | 2 | 0 |
| Arctic Skua Stercorarius parasiticus | Pomarine Skua Stercorarius pomarinus | 2 | 2 | 0 |
| Brünnich's Guillemot Uria lomvia | Common Guillemot Uria aalge | 2 | 2 | 0 |
| Glaucous Gull Larus hyperboreus | Iceland Gull Larus glaucoides | 2 | 1 | 1 |
| Meadow Pipit Anthus pratensis | Buff-bellied Pipit Anthus rubescens | 2 | 1 | 1 |
| Greater White-fronted Goose Anser albifrons | Pink-footed Goose Anser brachyrhynchus | 1 | 1 | 0 |
| Barnacle Goose Branta leucopsis | Cackling Goose Branta hutchinsii | 1 | 0 | 1 |
| Cackling Goose Branta hutchinsii | Canada Goose Branta canadensis | 1 | 1 | 0 |
| Barnacle Goose Branta leucopsis | Canada Goose Branta canadensis | 1 | 0 | 1 |
| Eurasian Wigeon Mareca penelope | Mourning Dove Zenaida macroura | 1 | 0 | 1 |
| King Eider Somateria spectabilis | Whimbrel Numenius phaeopus | 1 | 0 | 1 |
| Dunlin Calidris alpina | Purple Sandpiper Calidris maritima | 1 | 1 | 0 |
| Long-tailed Skua Stercorarius longicaudus | Arctic Skua Stercorarius parasiticus | 1 | 1 | 0 |
| Long-tailed Skua Stercorarius longicaudus | Pomarine Skua Stercorarius pomarinus | 1 | 1 | 0 |
| Arctic Skua Stercorarius parasiticus | Great Skua Stercorarius skua | 1 | 0 | 1 |
| Little Gull Hydrocoloeus minutus | Black-legged Kittiwake Rissa tridactyla | 1 | 1 | 0 |
| Black-legged Kittiwake Rissa tridactyla | Ivory Gull Pagophila eburnea | 1 | 1 | 0 |
| Sabine's Gull Xema sabini | Bonaparte's Gull Chroicocephalus philadelphia | 1 | 0 | 1 |
| Herring Gull Larus argentatus | Iceland Gull Larus glaucoides | 1 | 1 | 0 |
| Great Black-backed Gull Larus marinus | Lesser Black-backed Gull Larus fuscus | 1 | 1 | 0 |
| Arctic Skua Stercorarius parasiticus | Iceland Gull Larus glaucoides | 1 | 0 | 1 |
| Lesser Black-backed Gull Larus fuscus | Iceland Gull Larus glaucoides | 1 | 0 | 1 |
| Arctic Tern Sterna paradisaea | Common Tern Sterna hirundo | 1 | 1 | 0 |
| Arctic Tern Sterna paradisaea | Red-throated Diver Gavia stellata | 1 | 1 | 0 |
| Great Shearwater Ardenna gravis | Great Cormorant Phalacrocorax carbo | 1 | 1 | 0 |
| Gyr Falcon Falco rusticolus | Peregrine Falcon Falco peregrinus | 1 | 0 | 1 |
| Bohemian Waxwing Bombycilla garrulus | Arctic Redpoll Acanthis hornemanni | 1 | 1 | 0 |
| Lapland Bunting Calcarius lapponicus | Snow Bunting Plectrophenax nivalis | 1 | 0 | 1 |