Range Description: Caspian Tern - Hydroprogne caspia

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: 136,319 square km; Migration only: 138,609 square km
Caribbean - Wintering only: 230,701 square km
Central America - Wintering only: 53,188 square km
Mexico - Resident year-round: 70,990 square km; Wintering only: 777,148 square km
South America - Wintering only: 61,923 square km
U.S.A. - Resident year-round: 135,781 square km; Breeding only: 137,735 square km; Wintering only: 203,216 square km; Migration only: 2,514,958 square km