Howler Monkey - Loudest Land Animal

The howler monkey belongs to the sub family Alouattinae, of which currently nine species are recognized and studied. The howler monkey’s tail is just as long as its main frame, which is ideally up to 92 cm. The monkey has a prehensile tail and is large, but slow moving. They enjoy an average lifespan of anywhere between 15 and 20 years. These monkeys communicate with a loud whooping sound they make, that covers quite a distance, through the dense forest. No wonder the name ‘howler’! The howler monkeys live in groups and are threatened by captivity, by humans. The interesting social behavior trait observed in these animals is the powerful vocal communication. The medium of communication is exercised within the group and out of it too, as a warning, announcement or a mere show of presence.

The ‘howl’ of the howler monkey, the loudest land animal, sounds like a powerful roar. The roaring sound is a distinct feature of the male howler monkeys. In the females, the vocalization sounds like a grunt, like that of the pig. The sound is generated by the enlarged basihyal bone or the hyoid bone, that is a distinct feature in the species. The size of the basihyal bone is what enables the howler to produce the howler! They are considered the loudest land animals and the monkeys are observed to have trichromatic color vision. They are folivores, feeding only on the top leaves of the canopy formed by the tall trees in the dense forests and fruits, nuts and flowers. They move on all fours or quadrapedally and hold on to branches with both or one hand and the tail. This style of movement is at all times and it is very rare that a howler monkey uses the strength of its tail to support the whole body.

The tail of the howler monkey, the loudest land animal, is very strong. These monkeys rarely leave the trees and are the least active of all monkey species on the planet, resting almost eighty percent of the time. They limit all activities of the group or individual, to the branches and forks of the tall evergreens. The number of females is greater than the number of males in a group. Groups are formed by juveniles, both males and females, who wander or emigrate from their natal groups. Hence, in a group of howler monkeys, the adults are not related. Fighting for a short while and then reconciling among group members is frequent.

The howler monkeys become very aggressive in captivity. When the Maya ruins were discovered in Copan, the howler monkeys were represented in the art, as gods! The representations of the monkeys depict grave and solemn features, like as if the animals were guardians of some consecrated ground. Their role in the lfie of the Mayas and the acknowledgement of their presence is ample to understand the kind of importance attached to these beautiful creatures. The howler monkey, the loudest land animal, is also called ‘Congo’ in Costa Rica and Nicaragua, while in Belize, they are referred to as ‘baboons’. However, the latter is despite the fact that the howler monkey is in no way related to the primate that is usually identified by that name.

The howler monkey belongs to the categorized family of Atelidae and is studied by researchers under the ‘palliata’ group of primates. Research reveals that although these monkeys are not easy pets to maintain, mostly because of the size of their droppings and the roaring sound they are capable of producing, they enrich the forests of Central and South America by their presence. The howler monkey is distinct in features and terrain. This beautiful creature needs to be saved from unnecessary captivity and abuse. Human encroachment is taking its toll on the forest cover and the longevity of the howler monkey groups within needs to be guaranteed, for a richer, more diverse wild life population.