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
Black-billed Magpie Pica hudsonia Pied Crow Corvus albus 1 0 1
Northern House Wren Troglodytes aedon Marsh Wren Cistothorus palustris 1 0 1
Common Grackle Quiscalus quiscula Great-tailed Grackle Quiscalus mexicanus 1 0 1