Range Description: Gadwall - Anas strepera

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: 108,169 square km; Breeding only: 1,064,739 square km; Wintering only: 150,333 square km; Migration only: 2,035,997 square km
Caribbean - Migration only: 121,764 square km
Mexico - Resident year-round: 1,076 square km; Wintering only: 1,755,990 square km
U.S.A. - Resident year-round: 1,054,281 square km; Breeding only: 2,239,644 square km; Wintering only: 3,367,546 square km; Migration only: 531,255 square km