Great Black Hawk,  Buteogallus urubitinga
Great Black Hawk, 1/11/05, El Fuerte River, Sinaloa, Mexico
I saw this hawk on the short raft trip our tour grip took along the river in El Fuerte, Sinaloa. Both Common and Great Black Hawks are seen here; this looks to be a Great, as indicated by the whitish (rather than orange) lores, and the second white tail band, barely visible behind the perch (Common has only one.)