Reptilia - Falconiformes - Accipitridae

Full reference: A. H. Miller and C. G. Sibley. 1942. An Oligocene hawk from Colorado. The Condor 44(1):39-40

Belongs to Buteo according to A. H. Miller and C. G. Sibley 1942

Sister taxa: Buteo ales, Buteo antecursor, Buteo buteo, Buteo contortus, Buteo coterminus, Buteo dananus, Buteo grangeri, Buteo jamaicensis, Buteo lineatus, Buteo platypterus, Buteo rufinus, Buteo swainsoni, Buteo typhoius

Type specimen: UCMP 36266, a limb element (distal third of right metatarsus). Its type locality is Chalk Bluffs, which is in an Orellan terrestrial horizon in the White River Formation of Colorado.

Ecology: volant carnivore