Range Description: Bonaparte's Gull - Chroicocephalus philadelphia

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: 3,738,344 square km; Wintering only: 8,411 square km; Migration only: 1,635,895 square km
Caribbean - Wintering only: 163,269 square km
Mexico - Wintering only: 796,608 square km; Migration only: 3,289 square km
U.S.A. - Breeding only: 654,342 square km; Wintering only: 2,764,307 square km; Migration only: 5,434,342 square km