Range Description: Masked Duck - Nomonyx dominicus

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:

Caribbean - Resident year-round: 210,452 square km
Central America - Resident year-round: 77,018 square km
Mexico - Resident year-round: 398,662 square km
South America - Resident year-round: 7,717,152 square km
U.S.A. - Resident year-round: 21,170 square km