The proboscis monkey[1] (Nasalis larvatus) is an Old-World arboreal species with an unusually large nose, reddish-brown skin color, and a long tail.
- This long-nosed monkey is native to the island of Borneo in Southeast Asia, mainly found in the island’s mangrove forests and coastal areas.
- The proboscis monkey has long fur; the fur on the back is reddish brown, bright orange, tawny, or brick red.
- The undercoat is light gray, yellowish, or grayish to light orange. This is because babies are born with blue face that turns gray by 2.5 months.
- At 8.5 months, the face has become cream-colored like that of adults.
- Both sexes have bulging bellies, giving monkeys the appearance of a potbelly. Most of the monkey’s toes are webbed.
- Males have a broad, protruding nose that enhances resonant vocalizations. The female’s nose is smaller.
