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Picathartidae (bald crows, rockfowl; class Aves, order Passeriformes) A family of medium-sized birds which have grey upper-parts, white under-parts, and characteristically bare heads with yellow and black, or red, blue, and black skin. They have stout bills, fairly long tails, and rounded wings. They inhabit dense forest, feed on insects and amphibians, and build mud nests on the walls of caves. There is one genus, Picathartes, with two species, found in W. Africa. They are often placed in the family Timaliidae.