Brown Howler Monkey

• Common Name: Brown Howler
• Taxonomy Classification Year: 1812
• Monkey Size: 56 to 92 cm (22.05 to 36.22 in)
• Skin Color(s): Brown, reddish-orange or black
• Habitat: Forest, rainforest
• Diet: Herbivorous
• Native Countries: Brazil, Argentina

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.

According to the African Journal of Ecology publications^[§], Ocelots (Leopardus pardalis) and Cougars (Puma concolor) are the two main predators of brown howlers.

• Despite the common name “brown howler“, its color is remarkably variable, with some individuals mainly appearing black or reddish-orange.
• Members of the Alouatta genus are best known for their howls, which closely resemble growls or barks.
• Brown howlers rub against each other to communicate in groups. Rubbing can be used for different purposes.
• Their long prehensile tails allow them to hang from tree branches, using their tail as an anchor when feeding.
• Brown howler monkeys are highly susceptible to the yellow fever virus and have a high mortality rate when infected.