Costa Rica’s most common monkey is the Mantled Howler monkey. Howlers are all dark except for a mantle of light yellowish to reddish fur on the sides and a beard of fur on...more
Costa Rica’s most common monkey is the Mantled Howler monkey. Howlers are all dark except for a mantle of light yellowish to reddish fur on the sides and a beard of fur on the chin. Adult howlers will be approximately 20 inches in height and weigh about 11 pounds, with the male a little larger than the female. The males are easily distinguishable by their conspicuous white testicles. Howlers are renowned for their strong vocal cords, which are 25 times larger than that of other similar-sized monkeys. Howlers produce an intimidating, pulsating roar that can last several seconds. These sounds which are usually in response to either neighboring howlers or other similar sounds made by engines, thunder or even the Arenal Volcano. These roars can be heard several kilometers away.less