Male has long, heavy dark brown cape covering forequarters. Forearms, hands and feet are black. Tail is brown and tufted, shorter than body. Chest has heart-shaped patch of red naked skin sometimes divided in two in males. Hand has short fingers and an opposable thumb.
Ischial callosities are well developed.
Sexual dimorphism in size, weight, canine development and presence of mane in males. High mountains of central and northern Ethiopia. Habitat is treeless open rocky and grassy mountainous regions at the edge of cliffs. Range in Ethiopia overlaps that of the smaller Hamadryas Baboon. Foraging consists mainly of shuffling along on the haunches and picking up food items with the best precision grip of any nonhuman primate.