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 |
|---|---|---|---|---|
| Auckland Islands Shag Leucocarbo colensoi | Campbell Islands Shag Leucocarbo campbelli | 4 | 2 | 2 |
| Okarito Brown Kiwi Apteryx rowi | Little Spotted Kiwi Apteryx owenii | 2 | 2 | 0 |
| Little Spotted Kiwi Apteryx owenii | Great Spotted Kiwi Apteryx maxima | 2 | 1 | 1 |
| Shining Bronze-Cuckoo Chalcites lucidus | Little Bronze-Cuckoo Chalcites minutillus | 2 | 1 | 1 |
| Subantarctic Snipe Coenocorypha aucklandica | Latham's Snipe Gallinago hardwickii | 2 | 0 | 2 |
| Silver Gull Chroicocephalus novaehollandiae | Black-billed Gull Chroicocephalus bulleri | 2 | 0 | 2 |
| Macaroni Penguin Eudyptes chrysolophus | Royal Penguin Eudyptes schlegeli | 2 | 0 | 2 |
| Antarctic Petrel Thalassoica antarctica | Pintado Petrel Daption capense | 2 | 0 | 2 |
| Lesser Frigatebird Fregata ariel | Great Frigatebird Fregata minor | 2 | 1 | 1 |
| Bounty Islands Shag Leucocarbo ranfurlyi | New Zealand King Shag Leucocarbo carunculatus | 2 | 2 | 0 |
| Yellow-crowned Parakeet Cyanoramphus auriceps | Chatham Islands Parakeet Cyanoramphus forbesi | 2 | 0 | 2 |
| Cape Barren Goose Cereopsis novaehollandiae | Maned Duck Chenonetta jubata | 1 | 0 | 1 |
| Grey Teal Anas gracilis | Auckland Islands Teal Anas aucklandica | 1 | 1 | 0 |
| Grey Teal Anas gracilis | Brown Teal Anas chlorotis | 1 | 1 | 0 |
| Auckland Islands Teal Anas aucklandica | New Zealand Scaup Aythya novaeseelandiae | 1 | 1 | 0 |
| Auckland Islands Teal Anas aucklandica | Brown Teal Anas chlorotis | 1 | 0 | 1 |
| New Zealand Pigeon Hemiphaga novaeseelandiae | Chatham Islands Pigeon Hemiphaga chathamensis | 1 | 0 | 1 |
| Long-tailed Koel Urodynamis taitensis | Channel-billed Cuckoo Scythrops novaehollandiae | 1 | 0 | 1 |
| Shore Plover Thinornis novaeseelandiae | Double-banded Plover Anarhynchus bicinctus | 1 | 1 | 0 |
| Siberian Sand Plover Anarhynchus mongolus | Greater Sand Plover Anarhynchus leschenaultii | 1 | 1 | 0 |
| Snares Snipe Coenocorypha huegeli | Subantarctic Snipe Coenocorypha aucklandica | 1 | 1 | 0 |
| Broad-billed Sandpiper Calidris falcinellus | Least Sandpiper Calidris minutilla | 1 | 0 | 1 |
| Pomarine Skua Stercorarius pomarinus | Silver Gull Chroicocephalus novaehollandiae | 1 | 1 | 0 |
| Brown Noddy Anous stolidus | Black Noddy Anous minutus | 1 | 1 | 0 |
| Black Noddy Anous minutus | Sooty Tern Onychoprion fuscatus | 1 | 0 | 1 |
| Bridled Tern Onychoprion anaethetus | Grey-backed Tern Onychoprion lunatus | 1 | 0 | 1 |
| Australian Tern Gelochelidon macrotarsa | Whiskered Tern Chlidonias hybrida | 1 | 0 | 1 |
| Silver Gull Chroicocephalus novaehollandiae | White-fronted Tern Sterna striata | 1 | 0 | 1 |
| White-tailed Tropicbird Phaethon lepturus | Red-tailed Tropicbird Phaethon rubricauda | 1 | 0 | 1 |
| Little Penguin Eudyptula minor | Fiordland Penguin Eudyptes pachyrhynchus | 1 | 1 | 0 |
| Fiordland Penguin Eudyptes pachyrhynchus | Macaroni Penguin Eudyptes chrysolophus | 1 | 1 | 0 |
| Moseley's Rockhopper Penguin Eudyptes moseleyi | Snares Penguin Eudyptes robustus | 1 | 1 | 0 |
| Fiordland Penguin Eudyptes pachyrhynchus | Snares Penguin Eudyptes robustus | 1 | 0 | 1 |
| Northern Royal Albatross Diomedea sanfordi | Light-mantled Albatross Phoebetria palpebrata | 1 | 1 | 0 |
| Southern Royal Albatross Diomedea epomophora | Snowy Albatross Diomedea exulans | 1 | 1 | 0 |
| Grey-backed Storm-Petrel Garrodia nereis | White-bellied Storm-Petrel Fregetta grallaria | 1 | 0 | 1 |
| Chatham Albatross Thalassarche eremita | New Zealand Storm-Petrel Fregetta maoriana | 1 | 0 | 1 |
| Southern Fulmar Fulmarus glacialoides | Kermadec Petrel Pterodroma neglecta | 1 | 1 | 0 |
| Kerguelen Petrel Aphrodroma brevirostris | Kermadec Petrel Pterodroma neglecta | 1 | 1 | 0 |
| Magenta Petrel Pterodroma magentae | Herald Petrel Pterodroma heraldica | 1 | 0 | 1 |
| Herald Petrel Pterodroma heraldica | Providence Petrel Pterodroma solandri | 1 | 1 | 0 |
| Herald Petrel Pterodroma heraldica | White-headed Petrel Pterodroma lessonii | 1 | 1 | 0 |
| Mottled Petrel Pterodroma inexpectata | Black-winged Petrel Pterodroma nigripennis | 1 | 1 | 0 |
| Juan Fernandez Petrel Pterodroma externa | Black-winged Petrel Pterodroma nigripennis | 1 | 1 | 0 |
| Cook's Petrel Pterodroma cookii | Stejneger's Petrel Pterodroma longirostris | 1 | 1 | 0 |
| Stejneger's Petrel Pterodroma longirostris | Pycroft's Petrel Pterodroma pycrofti | 1 | 1 | 0 |
| Broad-billed Prion Pachyptila vittata | Antarctic Prion Pachyptila desolata | 1 | 0 | 1 |
| Salvin's Prion Pachyptila salvini | Slender-billed Prion Pachyptila belcheri | 1 | 0 | 1 |
| Antarctic Prion Pachyptila desolata | Buller's Shearwater Ardenna bulleri | 1 | 0 | 1 |
| Buller's Shearwater Ardenna bulleri | Hutton's Shearwater Puffinus huttoni | 1 | 1 | 0 |
| Sooty Shearwater Ardenna grisea | Short-tailed Shearwater Ardenna tenuirostris | 1 | 1 | 0 |
| Sooty Shearwater Ardenna grisea | Christmas Shearwater Puffinus nativitatis | 1 | 0 | 1 |
| Short-tailed Shearwater Ardenna tenuirostris | Christmas Shearwater Puffinus nativitatis | 1 | 0 | 1 |
| Christmas Shearwater Puffinus nativitatis | Hutton's Shearwater Puffinus huttoni | 1 | 0 | 1 |
| Sooty Shearwater Ardenna grisea | Fluttering Shearwater Puffinus gavia | 1 | 0 | 1 |
| Fluttering Shearwater Puffinus gavia | Subantarctic Shearwater Puffinus elegans | 1 | 0 | 1 |
| Australasian Gannet Morus serrator | Great Cormorant Phalacrocorax carbo | 1 | 1 | 0 |
| Little Pied Cormorant Microcarbo melanoleucos | Great Cormorant Phalacrocorax carbo | 1 | 1 | 0 |
| Great Cormorant Phalacrocorax carbo | Little Black Cormorant Phalacrocorax sulcirostris | 1 | 0 | 1 |
| Australasian Bittern Botaurus poiciloptilus | Black-backed Bittern Botaurus dubius | 1 | 0 | 1 |
| Great White Egret Ardea alba | Plumed Egret Ardea plumifera | 1 | 0 | 1 |
| Rifleman Acanthisitta chloris | Bush Wren Xenicus longipes | 1 | 0 | 1 |
| Pipipi Mohoua novaeseelandiae | North Island Robin Petroica longipes | 1 | 1 | 0 |
| Huia Heteralocha acutirostris | Tomtit Petroica macrocephala | 1 | 1 | 0 |
| Tomtit Petroica macrocephala | Black Robin Petroica traversi | 1 | 1 | 0 |
| Black Robin Petroica traversi | North Island Robin Petroica longipes | 1 | 0 | 1 |
| Welcome Swallow Hirundo neoxena | Fairy Martin Petrochelidon ariel | 1 | 0 | 1 |
| Welcome Swallow Hirundo neoxena | Silvereye Zosterops lateralis | 1 | 0 | 1 |
| Southern Rockhopper Penguin Eudyptes chrysocome | New Zealand Pipit Anthus novaeseelandiae | 1 | 0 | 1 |