Range Description: Dusky Flycatcher - Empidonax oberholseri

Summary of the extent of the breeding, wintering, migration and year-round range of this species in the Western Hemisphere, including Canada, U.S.A. and Mexico:

Canada - Breeding only: 535,818 square km
Central America - Wintering only: 24,252 square km
Mexico - Breeding only: 18,604 square km; Wintering only: 920,782 square km; Migration only: 434,129 square km
U.S.A. - Breeding only: 2,121,175 square km; Wintering only: 9,440 square km; Migration only: 548,272 square km