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Alouatta palliata (Mantled howler)

Least Concern (IUCN 3.1)|Least Concern

The mantled howler (Alouatta palliata), or golden-mantled howling monkey, is a species of howler monkey, a type of New World monkey, from Central and South America. It is one of the monkey species most often seen and heard in the wild in Central America. It takes its "mantled" name from the long guard hairs on its sides. The mantled howler is one of the largest Central American monkeys, and males can weigh up to 9.8 kg (22 lb). It is the one Central American monkey whose diet is composed mostly of leaves. The mantled howler has several adaptations to this folivorous diet. Since leaves are difficult to digest and provide less energy than most foods, mantled howlers spend the majority of each day resting and sleeping. Male mantled howlers also have an enlarged hyoid bone, which is a hollow bone near the vocal cords. This enlarged bone amplifies the calls made by the male, which give the monkey its common name of "howler". Howling allows the monkeys to locate each other without expending energy on moving or risking physical confrontation.