Sayornis nigricans nigricans:
Highlands of NE Mexico (Tamaulipas) to N Chiapas
Sayornis nigricans semiater:
W US (Oregon) to Baja California and W Mexico (Nayarit)
Sayornis nigricans aquaticus:
S Mexico (highlands of S Chiapas) to Guatemala and Nicaragua
Sayornis nigricans amnicola:
Highlands of Costa Rica and W Panama (Chiriquí)
Sayornis nigricans angustirostris: E Panama to Colombia,
Ecuador, S Peru and N Venezuela
Sayornis nigricans latirostris: Andes of Bolivia and NW
Arkive for photos,
picture gallery, sound recordings, video and bird data, checklists etc.
Field guide images of over 9,000 species. Checklists covering all bird
species and most of the worlds countries.