Range Description: Forster's Tern - Sterna forsteri

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: 737,853 square km; Migration only: 221,032 square km
Caribbean - Wintering only: 619,606 square km
Central America - Wintering only: 149,752 square km
Mexico - Resident year-round: 993 square km; Wintering only: 1,165,381 square km; Migration only: 623,269 square km
U.S.A. - Resident year-round: 185,360 square km; Breeding only: 873,422 square km; Wintering only: 1,052,262 square km; Migration only: 5,243,015 square km