Proboscis Monkey

Kingdom Order Family Genus Species
Animalia Primates Cercopithecidae Nasalis Nasalis larvatus
Proboscis Monkey
IUCN Status: Endangered
  • Common Name: Proboscis Monkey
  • Taxonomy Classification Year: 1787
  • Monkey Size: 60 to 70 cm (23.62 to 27.56 in)
  • Skin Color(s): Reddish-brown
  • Habitat: Rainforest
  • Diet: Omnivorous
  • Native Countries: Borneo

Proboscis Monkey Distribution

Proboscis Monkey Characteristics

Proboscis Monkey

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.

What Do Proboscis Monkeys Eat?

What Do Proboscis Monkeys Eat?

In the wild, the Proboscis Monkey nourishes on[¶]:

  • Hexapoda (Insecta)
  • Fig (Ficus)
  • Breadfruit (Artocarpus)
  • Common Fig (Ficus carica).
  • Clustertree (Ficus racemosa)
  • Combretums (Combretaceae)

What Eats Proboscis Monkeys?

What Eats Proboscis Monkeys Crocodiles?

Crocodiles (Crocodylidae) and Leopards (Panthera pardus) predate Proboscis Monkeys[§].

Proboscis Monkey Facts

Nasalis Larvatus

  • The proboscis monkey is a large species and one of the largest Old-World monkey species native to Asia. Only the Tibetan macaque and some gray langurs can match its size.
  • They usually live in groups consisting of an adult male, a few adult females, and their young.
  • These monkeys live in overlapping home ranges with little territoriality in a fission-fusion society where groups congregate at roosting sites by nightfall.
  • Probosci monkeys are diurnal and prefer to be active from late afternoon to dusk.
  • Proboscis monkeys meet during the day and travel together, but individuals only groom and play with their own group.

Suggested Reading: All Monkey Species

Cite This Page

APA7MLA8Chicago (2023, March 25). Proboscis Monkey. Bio Explorer. "Proboscis Monkey" Bio Explorer, 25 March 2023, "Proboscis Monkey" Bio Explorer, March 25 2023.
Key References
  • [1]“Nasalization by Nasalis larvatus: Larger noses audiovisually advertise conspecifics in proboscis monkeys – PMC”. Accessed November 15, 2022. Link.
  • [¶] – fgabriel1891/Plant-Frugivore-Interactions-SouthEastAsiaBoonratana, R. 2003. Feeding Ecology of Probosics Monkeys (Nasalis larvatus) in the Lower Kinabatangan, Sabah, Malasya


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