Endangered Species of the Week: Proboscis Monkeys


Proboscis monkeys are endemic to the jungles of Borneo, never straying far from the island’s rivers, coastal mangroves, and swamps. They are a highly arboreal species and will venture onto land only occasionally to search for food. They live in organized harem groups consisting of a dominant male and two to seven females and their offspring. Various groups often congregate near water at night to sleep.
Unfortunately, Borneo’s most threatened landscapes are home to these highly specialized primates. The rampant clearing of the region’s rain forests for timber, settlement, and oil palm plantations has depleted huge tracts of their habitat. The fragmentation of the monkeys’ range means they are being forced to descend from the trees more frequently and often must travel perilously long distances to find food. Their land predators include jaguars and some native peoples who consider proboscis monkey a delicacy.

Over the last 40 years, proboscis monkey populations have plummeted. They are currently protected from hunting or capture in Borneo.


It may seem hard to believe, but male proboscis monkeys use their fleshy, pendulous noses to attract mates. Scientists think these outsize organs create an echo chamber that amplifies the monkey’s call, impressing females and intimidating rival males. Sounds good to us!

Thank you to National Geogrpahic for providing the information about the Proboscis Monkey.

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