Argentina (B), Belize (B), Bolivia (B), Brazil (B), Colombia (B), Costa Rica (B), Ecuador (B), El Salvador (B), French Guiana (B), Guatemala (B), Guyana (B), Honduras (B), Mexico (B), Nicaragua (B), Panama (B), Paraguay (B), Peru (B), Suriname (B), Trinidad and Tobago (B), USA (B), Venezuela (B).
Eastern Colombia and eastern Ecuador, east to Venezuela and the Guianas, and south through Amazonian Brazil to northern Maranhío.
Population
Estimated population is 2,000,000 (2011).
Grey Hawk (Buteo plagiatus) [XC286555]
by from Florida Canyon, Pima, Arizona, United States (call)
Grey Hawk (Buteo plagiatus) [XC380722]
by Lilia Villalon from Huachuca Canyon - bridge at 0.2 miles, Cochise County, AZ, United States (begging call)
Subspecies
Asturina nitida and Asturina plagiata (Sibley and Monroe 1990, 1993) have been lumped as nitidus following AOU (1998) and moved to the genus Buteo following AOU (2006). Gender agreement of Buteo nitidus follows David and Gosselin (2002a).
Considered by some authors to be a subspecies of Grey-lined Hawk (Buteo nitidus).
BirdLife International Species Factsheet