Proposcis

Proposcis is a genus of Old World monkeys belonging to the family Cercopithecidae. The genus contains a single species, Nasalis larvatus, commonly known as the proboscis monkey. This primate is endemic to the island of Borneo, found in coastal and riverine areas. It is distinguished by its remarkably large nose, which is particularly prominent in males. This nose is thought to play a role in amplifying their calls and potentially in attracting mates.

Proboscis monkeys are arboreal, spending most of their time in trees. They are highly adapted to a riparian lifestyle and are excellent swimmers. Their diet consists primarily of leaves, unripe fruits, and seeds, which are processed by a specialized digestive system. They live in social groups, typically consisting of one adult male, several adult females, and their offspring.

The conservation status of the proboscis monkey is endangered. Habitat loss due to deforestation for palm oil plantations and other agricultural development poses the most significant threat to their survival. Hunting and poaching also contribute to population decline. Conservation efforts are underway to protect their remaining habitats and mitigate threats.