Range Description: Brown-headed Cowbird - Molothrus ater

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 - Resident year-round: 79,651 square km; Breeding only: 2,459,497 square km
Caribbean - Wintering only: 13,217 square km
Mexico - Resident year-round: 971,045 square km; Breeding only: 409 square km; Wintering only: 682,571 square km
U.S.A. - Resident year-round: 3,511,009 square km; Breeding only: 4,207,540 square km; Wintering only: 61,501 square km