The brown howler monkey[1], also called the brown howler monkey, is a species of New World monkey that lives in the forests of southeastern Brazil and northeastern Argentina.
- Brown howlers are among the largest leaf-eating primates of South American forests. Like spider monkeys, they have prehensile tails with a patch of bare skin on the ventral surface of the tail tip.
- They have relatively large, stocky frames with fur that varies in color from tan to black or dark red.
- The hair is lighter and less coarse on the belly, and the ears and face are hairless and dark.
- Being sexually dimorphic, male brown howlers weigh an average of 2.5 kg more than females. Many males have dark red bellies with yellowish red dorsal fur and darker arms, tails, and legs.
- Adult females are covered in reddish brown or dark brown fur.
