Range Description: Common Tern - Sterna hirundo

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: 3,733,859 square km; Migration only: 1,153,094 square km
Caribbean - Wintering only: 1,544,124 square km; Migration only: 111,372 square km
Central America - Wintering only: 209,081 square km
Mexico - Wintering only: 141,189 square km; Migration only: 578,205 square km
South America - Wintering only: 2,770,231 square km
U.S.A. - Breeding only: 548,883 square km; Wintering only: 80,990 square km; Migration only: 5,750,454 square km