Howler monkeys are the largest New World monkeys. They howl extremely loudly to advertise their presence in their territory.

Subspecies
None.

Life span
20 years.

Statistics
Head and body length: 52-64cm, Tail length: 59-69cm, Weight: Females: 6434g Males: 11,352g.

Physical description
Both sexes of the howler monkey have long black fur, and a prehensile tail with a hairless area on the underside.

Distribution
They inhabit Mexico, Belize and Guatemala.

Habitat
They are found in primary and secondary lowland and semi-deciduous forest.

Diet
Howler monkeys feed on fruit, leaves and flowers. They use their prehensile tail to suspend themselves from branches while feeding.

Behaviour
Howler monkeys are arboreal and diurnal. They live in groups of about seven, usually one or two males and numerous females. They have a home range of 3-25 ha. They move quadrupedally through the forest.

Reproduction
Little is known about the Guatemalan howler monkey's reproductive behaviour, but they are known to give birth to one infant.

Conservation status
Guatemalan howler monkeys are not on the IUCN Red List.