Range Description: Red-breasted Merganser - Mergus serrator

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: 6,296,963 square km; Wintering only: 218,784 square km; Migration only: 1,876,913 square km
Mexico - Wintering only: 146,442 square km; Migration only: 34,880 square km
U.S.A. - Breeding only: 1,698,129 square km; Wintering only: 618,356 square km; Migration only: 7,452,220 square km