 Another handsome aberration of the snake-eagle lineage (although, unlike the Philippine, has long been known to be a snake-eagle) is the bateleur ("Terathopius ecaudatus"), which has evolved unusually bright plumage in adults, with a huge red cere, red feet, bright yellow bill, and boldly contrasting grey-and-white markings over black plumage.The bateleur has specialized to feed extensively on carrion and almost any other feeding opportunity that presents itself.In terms of their reproductive biology and socio-sexual behavior, accipitrids share many characteristics with other extant groups of birds that appear not be directly related, but all of which have evolved to become active predators of other warm-blooded creatures.