#R, latitude 54° N, banks of the River Saskatchewan, Canada.
Formerly placed in a monotypic genus, Nuttallornis. Specific name previously listed as borealis, but cooperi has priority. Larger birds in SW (S California, N Baja California) sometimes separated as race marjorinus. Monotypic.
N & W Alaska E across C Canada to Maritime provinces, and S in USA to N California, also locally into NW Mexico (Baja California), in interior through Idaho and W Montana to NE Arizona, NW New Mexico and W Texas and, in E, to boreal regions of Adirondacks and New England S to Appalachian Mts. Winters locally in W & S Mexico (from Jalisco and S Veracruz) S to Panama and (mainly in mountainous regions) from Colombia and Venezuela S to SE Peru and NW Bolivia; more locally in the Guianas, S Amazonia (from lower R Amazon S to C Bolivia and Tapajós basin) and SE Brazil.
Food and feeding
Status and conservation
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