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 |
|---|---|---|---|---|
| European Storm-Petrel Hydrobates pelagicus | Manx Shearwater Puffinus puffinus | 2 | 1 | 1 |
| Herring Gull Larus argentatus | Glaucous Gull Larus hyperboreus | 2 | 0 | 2 |
| Great Black-backed Gull Larus marinus | Lesser Black-backed Gull Larus fuscus | 2 | 1 | 1 |
| Glaucous Gull Larus hyperboreus | Iceland Gull Larus glaucoides | 2 | 2 | 0 |
| Common Eider Somateria mollissima | Common Scoter Melanitta nigra | 1 | 0 | 1 |
| Common Scoter Melanitta nigra | Black Scoter Melanitta americana | 1 | 0 | 1 |
| Goosander Mergus merganser | Red-breasted Merganser Mergus serrator | 1 | 1 | 0 |
| Common Snipe Gallinago gallinago | Common Redshank Tringa totanus | 1 | 1 | 0 |
| Common Sandpiper Actitis hypoleucos | Spotted Sandpiper Actitis macularius | 1 | 1 | 0 |
| Common Redshank Tringa totanus | Red Knot Calidris canutus | 1 | 1 | 0 |
| Ruddy Turnstone Arenaria interpres | Sanderling Calidris alba | 1 | 1 | 0 |
| Red Knot Calidris canutus | Sanderling Calidris alba | 1 | 0 | 1 |
| Red Knot Calidris canutus | Dunlin Calidris alpina | 1 | 1 | 0 |
| Red Knot Calidris canutus | Purple Sandpiper Calidris maritima | 1 | 1 | 0 |
| Black Guillemot Cepphus grylle | Common Guillemot Uria aalge | 1 | 0 | 1 |
| Razorbill Alca torda | Brünnich's Guillemot Uria lomvia | 1 | 1 | 0 |
| Brünnich's Guillemot Uria lomvia | Common Guillemot Uria aalge | 1 | 1 | 0 |
| Great Shearwater Ardenna gravis | Manx Shearwater Puffinus puffinus | 1 | 1 | 0 |
| Great Cormorant Phalacrocorax carbo | European Shag Gulosus aristotelis | 1 | 0 | 1 |
| Melodious Warbler Hippolais polyglotta | Icterine Warbler Hippolais icterina | 1 | 1 | 0 |
| Blyth's Reed Warbler Acrocephalus dumetorum | Common Reed Warbler Acrocephalus scirpaceus | 1 | 0 | 1 |
| Eurasian Wren Troglodytes troglodytes | Pied Wagtail/White Wagtail Motacilla alba | 1 | 1 | 0 |
| Thrush Nightingale Luscinia luscinia | Common Nightingale Luscinia megarhynchos | 1 | 1 | 0 |
| Greylag Goose Anser anser | Pink-footed Goose Anser brachyrhynchus | 1 | 1 | 0 |
| Meadow Pipit Anthus pratensis | Tree Pipit Anthus trivialis | 1 | 1 | 0 |
| Greater White-fronted Goose Anser albifrons | Barnacle Goose Branta leucopsis | 1 | 1 | 0 |
| Gadwall Mareca strepera | Mallard Anas platyrhynchos | 1 | 1 | 0 |
| Eurasian Wigeon Mareca penelope | Eurasian/Green-winged Teal Anas crecca | 1 | 1 | 0 |