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 |
|---|---|---|---|---|
| Muscovy Duck Cairina moschata | Ash-throated Flycatcher Myiarchus cinerascens | 1 | 0 | 1 |
| Greater Scaup Aythya marila | Ruddy Duck Oxyura jamaicensis | 1 | 1 | 0 |
| Pied-billed Grebe Podilymbus podiceps | Slavonian Grebe Podiceps auritus | 1 | 0 | 1 |
| Common Ground Dove Columbina passerina | White-winged Dove Zenaida asiatica | 1 | 0 | 1 |
| Black-necked Stilt Himantopus mexicanus | Grey Plover Pluvialis squatarola | 1 | 1 | 0 |
| Long-billed Curlew Numenius americanus | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Spotted Sandpiper Actitis macularius | Red Knot Calidris canutus | 1 | 1 | 0 |
| Sanderling Calidris alba | Purple Sandpiper Calidris maritima | 1 | 0 | 1 |
| Western Gull Larus occidentalis | American Herring Gull Larus smithsonianus | 1 | 1 | 0 |
| Little Blue Heron Egretta caerulea | Snowy Egret Egretta thula | 1 | 1 | 0 |
| Least Flycatcher Empidonax minimus | Hammond's Flycatcher Empidonax hammondii | 1 | 0 | 1 |
| Swainson's Thrush Catharus ustulatus | Worm-eating Warbler Helmitheros vermivorum | 1 | 1 | 0 |
| Grey-crowned Rosy-Finch Leucosticte tephrocotis | Vesper Sparrow Pooecetes gramineus | 1 | 0 | 1 |
| European Greenfinch Chloris chloris | Common Crossbill Loxia curvirostra | 1 | 1 | 0 |
| Grasshopper Sparrow Ammodramus savannarum | Chipping Sparrow Spizella passerina | 1 | 1 | 0 |
| Yellow-headed Blackbird Xanthocephalus xanthocephalus | Hermit Warbler Setophaga occidentalis | 1 | 0 | 1 |
| American Redstart Setophaga ruticilla | Kirtland's Warbler Setophaga kirtlandii | 1 | 0 | 1 |