The Buckley's Forest-Falcon is a forest-falcon that is restricted to the southwestern Amazon basin. It occurs in tall forest, perhaps particularly flooded forest, in Amazonian Ecuador and Peru and immediately adjacent Colombia and Brazil. It is black above and white below, with a white collar and black tail with white bands. The collar distinguishes it from other forest-falcons except for the Collared Forest-Falcon (M. semitorquatus), which is larger and has a different call. The distinctive call of Buckley's is a mournful two- or three-noted series, the first note higher-pitched. There is very little published information on feeding and breeding behavior of Buckley's Forest-Falcon, although there is a record of a bird with a tree-rat (Mesomys sp.) in its stomach.