Range Description: Williamson's Sapsucker - Sphyrapicus thyroideus

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: 10,518 square km
Mexico - Wintering only: 393,778 square km
U.S.A. - Resident year-round: 145,510 square km; Breeding only: 492,452 square km; Wintering only: 206,744 square km