Range Description: Black Tern - Chlidonias niger

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: 2,767,555 square km; Migration only: 31,144 square km
Caribbean - Wintering only: 39,610 square km; Migration only: 2,304,964 square km
Central America - Wintering only: 323,596 square km; Migration only: 762,510 square km
Mexico - Wintering only: 212,855 square km; Migration only: 2,633,990 square km
South America - Wintering only: 570,846 square km; Migration only: 684,950 square km
U.S.A. - Breeding only: 2,585,228 square km; Migration only: 6,235,488 square km