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 |
|---|---|---|---|---|
| Dark-sided Flycatcher Muscicapa sibirica | Asian Brown Flycatcher Muscicapa dauurica | 3 | 2 | 1 |
| Yellow-browed Warbler Phylloscopus inornatus | Plain Flowerpecker Dicaeum minullum | 2 | 0 | 2 |
| Blue-and-white Flycatcher Cyanoptila cyanomelana | Hainan Blue Flycatcher Cyornis hainanus | 2 | 1 | 1 |
| Asian Koel Eudynamys scolopaceus | Square-tailed Drongo-Cuckoo Surniculus lugubris | 1 | 1 | 0 |
| Asian Koel Eudynamys scolopaceus | Hodgson's Hawk-Cuckoo Hierococcyx nisicolor | 1 | 1 | 0 |
| Northern Hawk-Cuckoo Hierococcyx hyperythrus | Hodgson's Hawk-Cuckoo Hierococcyx nisicolor | 1 | 1 | 0 |
| Hodgson's Hawk-Cuckoo Hierococcyx nisicolor | Lesser Cuckoo Cuculus poliocephalus | 1 | 0 | 1 |
| Pacific Swift Apus pacificus | Grey-throated Martin Riparia chinensis | 1 | 0 | 1 |
| Common Moorhen Gallinula chloropus | Brown Crake Zapornia akool | 1 | 0 | 1 |
| Ruddy-breasted Crake Zapornia fusca | Crested Honey-buzzard Pernis ptilorhynchus | 1 | 0 | 1 |
| Greater Sand Plover Anarhynchus leschenaultii | Kentish Plover Anarhynchus alexandrinus | 1 | 0 | 1 |
| Bar-tailed Godwit Limosa lapponica | Grey-tailed Tattler Tringa brevipes | 1 | 0 | 1 |
| Pin-tailed Snipe Gallinago stenura | Common Snipe Gallinago gallinago | 1 | 0 | 1 |
| Common Snipe Gallinago gallinago | Broad-billed Sandpiper Calidris falcinellus | 1 | 0 | 1 |
| Red-necked Phalarope Phalaropus lobatus | Red-necked Stint Calidris ruficollis | 1 | 0 | 1 |
| Common Sandpiper Actitis hypoleucos | Curlew Sandpiper Calidris ferruginea | 1 | 0 | 1 |
| Marsh Sandpiper Tringa stagnatilis | Common Greenshank Tringa nebularia | 1 | 0 | 1 |
| Common Redshank Tringa totanus | Spotted Redshank Tringa erythropus | 1 | 0 | 1 |
| Dunlin Calidris alpina | Pectoral Sandpiper Calidris melanotos | 1 | 0 | 1 |
| Dunlin Calidris alpina | White-winged Black Tern Chlidonias leucopterus | 1 | 0 | 1 |
| Black-legged Kittiwake Rissa tridactyla | Common Gull Larus canus | 1 | 0 | 1 |
| Saunders's Gull Saundersilarus saundersi | Relict Gull Ichthyaetus relictus | 1 | 1 | 0 |
| Black-headed Gull Chroicocephalus ridibundus | Glaucous-winged Gull Larus glaucescens | 1 | 0 | 1 |
| Brown Noddy Anous stolidus | Collared Crow Corvus torquatus | 1 | 1 | 0 |
| White-tailed Tropicbird Phaethon lepturus | Black-winged Kite Elanus caeruleus | 1 | 1 | 0 |
| Flesh-footed Shearwater Ardenna carneipes | Short-tailed Shearwater Ardenna tenuirostris | 1 | 1 | 0 |
| Striated Heron Butorides striata | Chinese Pond Heron Ardeola bacchus | 1 | 1 | 0 |
| Eurasian Spoonbill Platalea leucorodia | Black-faced Spoonbill Platalea minor | 1 | 1 | 0 |
| Imperial Eagle Aquila heliaca | Eastern Buzzard Buteo japonicus | 1 | 0 | 1 |
| Eastern Marsh Harrier Circus spilonotus | Japanese Sparrowhawk Tachyspiza gularis | 1 | 1 | 0 |
| Eurasian Sparrowhawk Accipiter nisus | Eurasian Hobby Falco subbuteo | 1 | 1 | 0 |
| Common Kingfisher Alcedo atthis | Black-capped Kingfisher Halcyon pileata | 1 | 0 | 1 |
| Blue-tailed Bee-eater Merops philippinus | Dollarbird Eurystomus orientalis | 1 | 1 | 0 |
| Grey-chinned Minivet Pericrocotus solaris | Ashy Minivet Pericrocotus divaricatus | 1 | 0 | 1 |
| Grey-chinned Minivet Pericrocotus solaris | Brown-rumped Minivet Pericrocotus cantonensis | 1 | 0 | 1 |
| White-bellied Erpornis Erpornis zantholeuca | Indochinese Yuhina Staphida torqueola | 1 | 0 | 1 |
| Black Drongo Dicrurus macrocercus | Hair-crested Drongo Dicrurus hottentottus | 1 | 0 | 1 |
| Grey-backed Shrike Lanius tephronotus | Chinese Grey Shrike Lanius sphenocercus | 1 | 0 | 1 |
| Chinese Penduline Tit Remiz consobrinus | Chestnut-eared Bunting Emberiza fucata | 1 | 0 | 1 |
| Common Tailorbird Orthotomus sutorius | Yellow-bellied Prinia Prinia flaviventris | 1 | 0 | 1 |
| Plain Prinia Prinia inornata | Black-browed Reed Warbler Acrocephalus bistrigiceps | 1 | 0 | 1 |
| Plain Prinia Prinia inornata | Arctic Warbler Phylloscopus borealis | 1 | 0 | 1 |
| Zitting Cisticola Cisticola juncidis | Lanceolated Warbler Locustella lanceolata | 1 | 0 | 1 |
| Zitting Cisticola Cisticola juncidis | Baikal Bush Warbler Locustella davidi | 1 | 0 | 1 |
| Golden-headed Cisticola Cisticola exilis | Chinese Grassbird Graminicola striatus | 1 | 1 | 0 |
| Thick-billed Warbler Arundinax aedon | Manchurian Reed Warbler Acrocephalus tangorum | 1 | 0 | 1 |
| Thick-billed Warbler Arundinax aedon | Oriental Reed Warbler Acrocephalus orientalis | 1 | 1 | 0 |
| Manchurian Reed Warbler Acrocephalus tangorum | Oriental Reed Warbler Acrocephalus orientalis | 1 | 1 | 0 |
| Russet Bush Warbler Locustella mandelli | Siberian Rubythroat Calliope calliope | 1 | 1 | 0 |
| Sand Martin Riparia riparia | Asian House Martin Delichon dasypus | 1 | 1 | 0 |
| Barn Swallow Hirundo rustica | Siberian House Martin Delichon lagopodum | 1 | 1 | 0 |
| Chestnut Bulbul Hemixos castanonotus | Mountain Bulbul Ixos mcclellandii | 1 | 0 | 1 |
| Black Bulbul Hypsipetes leucocephalus | Light-vented Bulbul Pycnonotus sinensis | 1 | 0 | 1 |
| Yellow-browed Warbler Phylloscopus inornatus | Two-barred Warbler Phylloscopus plumbeitarsus | 1 | 1 | 0 |
| Pallas's Warbler Phylloscopus proregulus | Radde's Warbler Phylloscopus schwarzi | 1 | 0 | 1 |
| Yellow-streaked Warbler Phylloscopus armandii | Kloss's Leaf Warbler Phylloscopus ogilviegranti | 1 | 0 | 1 |
| Dusky Warbler Phylloscopus fuscatus | Pale-legged Leaf Warbler Phylloscopus tenellipes | 1 | 1 | 0 |
| Eastern Crowned Warbler Phylloscopus coronatus | Pale-legged Leaf Warbler Phylloscopus tenellipes | 1 | 1 | 0 |
| Pale-legged Leaf Warbler Phylloscopus tenellipes | Hartert's Leaf Warbler Phylloscopus goodsoni | 1 | 0 | 1 |
| Chestnut-crowned Warbler Phylloscopus castaniceps | Mountain Tailorbird Phyllergates cucullatus | 1 | 1 | 0 |
| Asian Stubtail Urosphena squameiceps | Mountain Tailorbird Phyllergates cucullatus | 1 | 0 | 1 |
| Asian Stubtail Urosphena squameiceps | Manchurian Bush Warbler Horornis canturians | 1 | 0 | 1 |
| Manchurian Bush Warbler Horornis canturians | Chestnut Bunting Emberiza rutila | 1 | 1 | 0 |
| Swinhoe's White-eye Zosterops simplex | Green-backed Flycatcher Ficedula elisae | 1 | 1 | 0 |
| Chinese Grassbird Graminicola striatus | Chinese Hwamei Garrulax canorus | 1 | 1 | 0 |
| Chinese Hwamei Garrulax canorus | Eurasian Tree Sparrow Passer montanus | 1 | 1 | 0 |
| White-shouldered Starling Sturnia sinensis | Red-billed Starling Spodiopsar sericeus | 1 | 0 | 1 |
| Chinese Blackbird Turdus mandarinus | Japanese Thrush Turdus cardis | 1 | 0 | 1 |
| Eyebrowed Thrush Turdus obscurus | Dusky Thrush Turdus eunomus | 1 | 1 | 0 |
| Pale Thrush Turdus pallidus | Dusky Thrush Turdus eunomus | 1 | 1 | 0 |
| Grey-streaked Flycatcher Muscicapa griseisticta | Dark-sided Flycatcher Muscicapa sibirica | 1 | 0 | 1 |
| Oriental Magpie-Robin Copsychus saularis | Blue-and-white Flycatcher Cyanoptila cyanomelana | 1 | 1 | 0 |
| Lesser Shortwing Brachypteryx leucophris | Ultramarine Flycatcher Ficedula superciliaris | 1 | 0 | 1 |
| Rufous-tailed Robin Larvivora sibilans | Rufous-gorgeted Flycatcher Ficedula strophiata | 1 | 0 | 1 |
| Yellow-rumped Flycatcher Ficedula zanthopygia | Ryukyu Flycatcher Ficedula owstoni | 1 | 1 | 0 |
| Rufous-gorgeted Flycatcher Ficedula strophiata | Plumbeous Redstart Phoenicurus fuliginosus | 1 | 1 | 0 |
| Ultramarine Flycatcher Ficedula superciliaris | Plumbeous Redstart Phoenicurus fuliginosus | 1 | 0 | 1 |
| Western Yellow Wagtail Motacilla flava | Eastern Yellow Wagtail Motacilla tschutschensis | 1 | 1 | 0 |
| Upland Pipit Anthus sylvanus | Olive-backed Pipit Anthus hodgsoni | 1 | 1 | 0 |
| Red-throated Pipit Anthus cervinus | Little Bunting Emberiza pusilla | 1 | 0 | 1 |
| Greater White-fronted Goose Anser albifrons | Lesser White-fronted Goose Anser erythropus | 1 | 0 | 1 |
| Black-headed Bunting Emberiza melanocephala | Red-headed Bunting Emberiza bruniceps | 1 | 0 | 1 |
| Greater White-fronted Goose Anser albifrons | Tundra Bean Goose Anser serrirostris | 1 | 0 | 1 |
| Northern Shoveler Spatula clypeata | Eurasian/Green-winged Teal Anas crecca | 1 | 1 | 0 |