The proboscis monkey is a species of primate that lives in the rainforests, mangroves and swamp forests of the Isle of Borneo (Indonesia, Malaysia and Brunei). The monkeys have dark orange fur on their backs and the top of their heads, paler orange fur on their chests, stomachs and upper arms and grey fur on their lower bodies, legs and forearms. Males have a distinctive elongated nose that hangs down over their lip. Females do not have this pronounced feature, although their noses are still quite prominent for primates. Males and females differ in size, with males being an average height of 66-76cm and weighing between 16 and 22.5kg, and females measuring between 53-62cm in height and weighing between 7 and 12kg.
Latin Name
Nasalis larvatus larvatus
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proboscis-monkey
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Animal Facts
Proboscis monkeys have webbed toes and are good swimmers.
The proboscis monkey is a very vocal species, with group members often calling to each other to bond, relay information or initiate mating.
The large nose of the male proboscis monkey allows it to make louder vocalisations, which in turn increases the likelihood of attracting females.
The proboscis monkey has a ‘pot belly’ due to their stomach acting like that of a ruminants and breaking down tough-to-digest plant matter.
Alpha male proboscis monkeys make alarm calls to warn their group members of nearby danger.
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