There are 12 recognized subspecies of the Roadside Hawk (Buteo magnirostris).
The one occurring in east Peru is Buteo magnirostris occiduus.

1st & 2nd photo: Manu Wildlife Center, Manu Biosphere Reserve, Peru, 28 June 2009
3rd & 4th photo: Reserva Ecologica Taricaya, Puerto Maldonado, Peru, 28 May 2009