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 |
|---|---|---|---|---|
| Chilean Skua Stercorarius chilensis | South Polar Skua Stercorarius maccormicki | 3 | 2 | 1 |
| South Georgia Shag Leucocarbo georgianus | Antarctic Shag Leucocarbo bransfieldensis | 3 | 2 | 1 |
| Arctic Skua Stercorarius parasiticus | Pomarine Skua Stercorarius pomarinus | 3 | 2 | 1 |
| Southern Giant-Petrel Macronectes giganteus | Northern Giant-Petrel Macronectes halli | 3 | 0 | 3 |
| Northern Royal Albatross Diomedea sanfordi | Southern Royal Albatross Diomedea epomophora | 2 | 1 | 1 |
| Brown Skua Stercorarius antarcticus | South Polar Skua Stercorarius maccormicki | 2 | 1 | 1 |
| King Penguin Aptenodytes patagonicus | Emperor Penguin Aptenodytes forsteri | 2 | 1 | 1 |
| Northern Royal Albatross Diomedea sanfordi | Snowy Albatross Diomedea exulans | 2 | 2 | 0 |
| Southern Royal Albatross Diomedea epomophora | Antipodean Albatross Diomedea antipodensis | 2 | 0 | 2 |
| Salvin's Albatross Thalassarche salvini | Black-browed Albatross Thalassarche melanophris | 2 | 1 | 1 |
| Grey-backed Storm-Petrel Garrodia nereis | Black-bellied Storm-Petrel Fregetta tropica | 2 | 1 | 1 |
| Mottled Petrel Pterodroma inexpectata | Atlantic Petrel Pterodroma incerta | 2 | 1 | 1 |
| Blue Petrel Halobaena caerulea | Antarctic Prion Pachyptila desolata | 2 | 0 | 2 |
| Antarctic Prion Pachyptila desolata | Slender-billed Prion Pachyptila belcheri | 2 | 0 | 2 |
| Slender-billed Prion Pachyptila belcheri | White-chinned Petrel Procellaria aequinoctialis | 2 | 0 | 2 |
| Sooty Shearwater Ardenna grisea | Short-tailed Shearwater Ardenna tenuirostris | 2 | 2 | 0 |
| Antipodean Albatross Diomedea antipodensis | Grey-headed Albatross Thalassarche chrysostoma | 1 | 0 | 1 |
| Antipodean Albatross Diomedea antipodensis | Black-browed Albatross Thalassarche melanophris | 1 | 0 | 1 |
| Sooty Albatross Phoebetria fusca | Light-mantled Albatross Phoebetria palpebrata | 1 | 0 | 1 |
| Antarctic Prion Pachyptila desolata | Short-tailed Shearwater Ardenna tenuirostris | 1 | 1 | 0 |
| Black-browed Albatross Thalassarche melanophris | Grey-backed Storm-Petrel Garrodia nereis | 1 | 0 | 1 |
| Wilson's Storm-Petrel Oceanites oceanicus | Black-bellied Storm-Petrel Fregetta tropica | 1 | 1 | 0 |
| South Georgia Diving-Petrel Pelecanoides georgicus | Antarctic Shag Leucocarbo bransfieldensis | 1 | 0 | 1 |
| Chilean Skua Stercorarius chilensis | Brown Skua Stercorarius antarcticus | 1 | 0 | 1 |
| Southern Giant-Petrel Macronectes giganteus | Antarctic Petrel Thalassoica antarctica | 1 | 1 | 0 |
| Northern Giant-Petrel Macronectes halli | Southern Fulmar Fulmarus glacialoides | 1 | 1 | 0 |
| Antarctic Petrel Thalassoica antarctica | Pintado Petrel Daption capense | 1 | 1 | 0 |
| Pintado Petrel Daption capense | Kerguelen Petrel Aphrodroma brevirostris | 1 | 0 | 1 |
| Kerguelen Petrel Aphrodroma brevirostris | Mottled Petrel Pterodroma inexpectata | 1 | 1 | 0 |
| Kerguelen Petrel Aphrodroma brevirostris | Grey Petrel Procellaria cinerea | 1 | 1 | 0 |
| Soft-plumaged Petrel Pterodroma mollis | Mottled Petrel Pterodroma inexpectata | 1 | 0 | 1 |
| Soft-plumaged Petrel Pterodroma mollis | Blue Petrel Halobaena caerulea | 1 | 0 | 1 |
| Slender-billed Prion Pachyptila belcheri | Sooty Shearwater Ardenna grisea | 1 | 1 | 0 |
| Mottled Petrel Pterodroma inexpectata | Fairy Prion Pachyptila turtur | 1 | 1 | 0 |
| Atlantic Petrel Pterodroma incerta | Fairy Prion Pachyptila turtur | 1 | 0 | 1 |
| South Polar Skua Stercorarius maccormicki | Sooty Albatross Phoebetria fusca | 1 | 0 | 1 |
| Slender-billed Prion Pachyptila belcheri | Short-tailed Shearwater Ardenna tenuirostris | 1 | 0 | 1 |
| King Penguin Aptenodytes patagonicus | Adelie Penguin Pygoscelis adeliae | 1 | 0 | 1 |
| Gentoo Penguin Pygoscelis papua | Southern Rockhopper Penguin Eudyptes chrysocome | 1 | 0 | 1 |
| Snowy Sheathbill Chionis albus | Arctic Tern Sterna paradisaea | 1 | 1 | 0 |
| Blue Petrel Halobaena caerulea | Slender-billed Prion Pachyptila belcheri | 1 | 1 | 0 |
| Northern Royal Albatross Diomedea sanfordi | Black-browed Albatross Thalassarche melanophris | 1 | 1 | 0 |
| Southern Royal Albatross Diomedea epomophora | Snowy Albatross Diomedea exulans | 1 | 0 | 1 |
| Snowy Sheathbill Chionis albus | American Barn Owl Tyto furcata | 1 | 0 | 1 |
| Snowy Albatross Diomedea exulans | Antipodean Albatross Diomedea antipodensis | 1 | 0 | 1 |