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 |
|---|---|---|---|---|
| Yellow-billed Pintail Anas georgica | Yellow-billed Teal Anas flavirostris | 2 | 1 | 1 |
| Guira Cuckoo Guira guira | Striped Cuckoo Tapera naevia | 2 | 2 | 0 |
| Grey Plover Pluvialis squatarola | American Golden Plover Pluvialis dominica | 2 | 0 | 2 |
| Chotoy Spinetail Schoeniophylax phryganophilus | Spix's Spinetail Synallaxis spixi | 2 | 0 | 2 |
| Saffron-cowled Blackbird Xanthopsar flavus | Brown-and-yellow Marshbird Pseudoleistes virescens | 2 | 1 | 1 |
| Brown Tinamou Crypturellus obsoletus | Red-winged Tinamou Rhynchotus rufescens | 1 | 0 | 1 |
| Brazilian Teal Amazonetta brasiliensis | Cinnamon Teal Spatula cyanoptera | 1 | 1 | 0 |
| Rosy-billed Pochard Netta peposaca | Lake Duck Oxyura vittata | 1 | 0 | 1 |
| Least Grebe Tachybaptus dominicus | Great Grebe Podiceps major | 1 | 1 | 0 |
| Picazuro Pigeon Patagioenas picazuro | Ruddy Ground Dove Columbina talpacoti | 1 | 1 | 0 |
| Spot-winged Pigeon Patagioenas maculosa | Picui Ground Dove Columbina picui | 1 | 1 | 0 |
| Ruddy Ground Dove Columbina talpacoti | Picui Ground Dove Columbina picui | 1 | 1 | 0 |
| Band-winged Nightjar Systellura longirostris | Little Nightjar Setopagis parvula | 1 | 0 | 1 |
| Glittering-bellied Emerald Chlorostilbon lucidus | Gilded Hummingbird Hylocharis chrysura | 1 | 0 | 1 |
| Spotted Rail Pardirallus maculatus | Giant Wood-Rail Aramides ypecaha | 1 | 1 | 0 |
| American Moorhen Gallinula galeata | Red-fronted Coot Fulica rufifrons | 1 | 0 | 1 |
| American Oystercatcher Haematopus palliatus | Tawny-throated Dotterel Oreopholus ruficollis | 1 | 1 | 0 |
| Lesser Yellowlegs Tringa flavipes | Greater Yellowlegs Tringa melanoleuca | 1 | 0 | 1 |
| Sanderling Calidris alba | Baird's Sandpiper Calidris bairdii | 1 | 1 | 0 |
| Brown Skua Stercorarius antarcticus | South Polar Skua Stercorarius maccormicki | 1 | 1 | 0 |
| Brown-hooded Gull Chroicocephalus maculipennis | Grey-hooded Gull Chroicocephalus cirrocephalus | 1 | 1 | 0 |
| Yellow-billed Tern Sternula superciliaris | Large-billed Tern Phaetusa simplex | 1 | 0 | 1 |
| Magellanic Penguin Spheniscus magellanicus | Southern Rockhopper Penguin Eudyptes chrysocome | 1 | 0 | 1 |
| Antarctic Prion Pachyptila desolata | Slender-billed Prion Pachyptila belcheri | 1 | 0 | 1 |
| Antarctic Prion Pachyptila desolata | White-chinned Petrel Procellaria aequinoctialis | 1 | 0 | 1 |
| Maguari Stork Ciconia maguari | Wood Stork Mycteria americana | 1 | 1 | 0 |
| Crane Hawk Geranospiza caerulescens | Great Black Hawk Buteogallus urubitinga | 1 | 0 | 1 |
| Harris's Hawk Parabuteo unicinctus | White-tailed Hawk Geranoaetus albicaudatus | 1 | 0 | 1 |
| White-barred Piculet Picumnus cirratus | Mottled Piculet Picumnus nebulosus | 1 | 1 | 0 |
| White-spotted Woodpecker Veniliornis spilogaster | Checkered Woodpecker Veniliornis mixtus | 1 | 1 | 0 |
| Checkered Woodpecker Veniliornis mixtus | Green-barred Woodpecker Colaptes melanochloros | 1 | 0 | 1 |
| Monk Parakeet Myiopsitta monachus | Burrowing Parakeet Cyanoliseus patagonus | 1 | 0 | 1 |
| Burrowing Parakeet Cyanoliseus patagonus | White-eyed Parakeet Psittacara leucophthalmus | 1 | 0 | 1 |
| Narrow-billed Woodcreeper Lepidocolaptes angustirostris | Scalloped Woodcreeper Lepidocolaptes falcinellus | 1 | 0 | 1 |
| Wren-like Rushbird Phleocryptes melanops | Curve-billed Reedhaunter Limnornis curvirostris | 1 | 1 | 0 |
| Sharp-billed Treehunter Heliobletus contaminatus | Buff-browed Foliage-gleaner Syndactyla rufosuperciliata | 1 | 0 | 1 |
| Buff-browed Foliage-gleaner Syndactyla rufosuperciliata | Little Thornbird Phacellodomus sibilatrix | 1 | 0 | 1 |
| Freckle-breasted Thornbird Phacellodomus striaticollis | Greater Thornbird Phacellodomus ruber | 1 | 1 | 0 |
| Firewood-gatherer Anumbius annumbi | Sharp-billed Canastero Asthenes pyrrholeuca | 1 | 1 | 0 |
| Short-billed Canastero Asthenes baeri | Sharp-billed Canastero Asthenes pyrrholeuca | 1 | 0 | 1 |
| Stripe-crowned Spinetail Cranioleuca pyrrhophia | Bay-capped Wren-Spinetail Spartonoica maluroides | 1 | 1 | 0 |
| Bay-capped Wren-Spinetail Spartonoica maluroides | Yellow-chinned Spinetail Certhiaxis cinnamomeus | 1 | 0 | 1 |
| Brown Cacholote Pseudoseisura lophotes | Chotoy Spinetail Schoeniophylax phryganophilus | 1 | 0 | 1 |
| Crested Becard Pachyramphus validus | Mottle-cheeked Tyrannulet Phylloscartes ventralis | 1 | 1 | 0 |
| Mottle-cheeked Tyrannulet Phylloscartes ventralis | Yellow-olive Flatbill Tolmomyias sulphurescens | 1 | 1 | 0 |
| Mottle-cheeked Tyrannulet Phylloscartes ventralis | Pearly-vented Tody-Tyrant Hemitriccus margaritaceiventer | 1 | 0 | 1 |
| Pearly-vented Tody-Tyrant Hemitriccus margaritaceiventer | Yellow-olive Flatbill Tolmomyias sulphurescens | 1 | 0 | 1 |
| Ochre-faced Tody-Flycatcher Poecilotriccus plumbeiceps | Cliff Flycatcher Hirundinea ferruginea | 1 | 0 | 1 |
| Bearded Tachuri Polystictus pectoralis | Warbling Doradito Pseudocolopteryx flaviventris | 1 | 1 | 0 |
| Large Elaenia Elaenia spectabilis | Olivaceous Elaenia Elaenia mesoleuca | 1 | 1 | 0 |
| White-crested Elaenia Elaenia albiceps | White-crested Tyrannulet Serpophaga subcristata | 1 | 1 | 0 |
| Fulvous-crowned Scrub-Tyrant Euscarthmus meloryphus | Euler's Flycatcher Lathrotriccus euleri | 1 | 1 | 0 |
| Bran-coloured Flycatcher Myiophobus fasciatus | Euler's Flycatcher Lathrotriccus euleri | 1 | 1 | 0 |
| Southern Scrub-Flycatcher Sublegatus modestus | Vermilion Flycatcher Pyrocephalus rubinus | 1 | 1 | 0 |
| Dark-faced Ground-Tyrant Muscisaxicola maclovianus | Grey Monjita Nengetus cinereus | 1 | 1 | 0 |
| Black-crowned Monjita Neoxolmis coronatus | Black-and-white Monjita Heteroxolmis dominicana | 1 | 1 | 0 |
| Swainson's Flycatcher Myiarchus swainsoni | Cattle Tyrant Machetornis rixosa | 1 | 0 | 1 |
| Crowned Slaty Flycatcher Empidonomus aurantioatrocristatus | Tropical Kingbird Tyrannus melancholicus | 1 | 0 | 1 |
| White-rumped Swallow Tachycineta leucorrhoa | Chilean Swallow Tachycineta leucopyga | 1 | 0 | 1 |
| Tawny-headed Swallow Alopochelidon fucata | Cliff Swallow Petrochelidon pyrrhonota | 1 | 1 | 0 |
| Correndera Pipit Anthus correndera | Hellmayr's Pipit Anthus hellmayri | 1 | 1 | 0 |
| Hooded Siskin Spinus magellanicus | White-browed Meadowlark Leistes superciliaris | 1 | 1 | 0 |
| Grassland Sparrow Ammodramus humeralis | Rufous-collared Sparrow Zonotrichia capensis | 1 | 1 | 0 |
| Solitary Black Cacique Cacicus solitarius | Screaming Cowbird Molothrus rufoaxillaris | 1 | 1 | 0 |
| Screaming Cowbird Molothrus rufoaxillaris | Chopi Blackbird Gnorimopsar chopi | 1 | 1 | 0 |
| Shiny Cowbird Molothrus bonariensis | Chopi Blackbird Gnorimopsar chopi | 1 | 1 | 0 |
| Yellow-rumped Marshbird Pseudoleistes guirahuro | Brown-and-yellow Marshbird Pseudoleistes virescens | 1 | 1 | 0 |
| Golden-crowned Warbler Basileuterus culicivorus | Hepatic Tanager Piranga flava | 1 | 0 | 1 |
| Red-crested Cardinal Paroaria coronata | Yellow-billed Cardinal Paroaria capitata | 1 | 0 | 1 |
| Yellow-billed Cardinal Paroaria capitata | Grey-throated Warbling Finch Microspingus cabanisi | 1 | 0 | 1 |
| Chestnut-backed Tanager Stilpnia preciosa | Black-and-rufous Warbling Finch Poospiza nigrorufa | 1 | 0 | 1 |
| Saffron Finch Sicalis flaveola | Wedge-tailed Grass-Finch Emberizoides herbicola | 1 | 0 | 1 |
| Lesser Grass-Finch Emberizoides ypiranganus | Great Pampa-Finch Embernagra platensis | 1 | 0 | 1 |
| Dark-throated Seedeater Sporophila ruficollis | Chestnut Seedeater Sporophila cinnamomea | 1 | 1 | 0 |
| Chestnut Seedeater Sporophila cinnamomea | Double-collared Seedeater Sporophila caerulescens | 1 | 1 | 0 |