The black howler (Alouatta caraya) is found in the rainforests of central South America. Howlers use an enlarged and highly specialized voice box to produce their howls. Black howlers practice allomothering where females carry, groom and protect infants other than their own. Howlers spend up to 70% of their day resting, fermenting leaves in their enlarged caecums.
- It played Yeti (Abominable Snowman) in American Animals, Inc