Skip to content
WAnimals
  • Map
  • Species
  • Parks
  • Diving
Log inCreate account
WAnimals

The guide for travellers and animal lovers: discover, plan and share your wild adventures around the world.

Discover wildlife

  • Species
  • Ecosystems
  • Glossary
  • Tags

Explore places

  • Map
  • Countries
  • Parks
  • Diving

Plan experiences

  • Guides

Learn

  • Blog

Resources

  • About us
  • How we build our profiles
  • Help centre
  • Contact
  • Install the app

Follow us

Account

  • Log in
  • Create account

© 2026 WAnimals. All rights reserved.

Terms of servicePrivacyCookiesLegal notice
MapSpeciesParksDiving
  1. Home
  2. Species
  3. Proboscis Monkey

One of the 18 monkeys on WAnimals

Proboscis Monkey (Nasalis larvatus)

Mammals · Primates · Cercopithecidae

Proboscis Monkey

Nasalis larvatus

Endangered

At very high risk of extinction in the wild in the near future.

Spotted something wrong?

Males grow the largest nose relative to body size of any primate, which works as a resonating chamber to amplify their calls.

Weight

7 kg – 22 kg

Size

52 cm – 72 cm

Life expectancy

15 years

Diet

Herbivore

Feeds mainly on plants.

Activity

Diurnal

Active mainly during the day.

Social structure

Family group

Lives in small family groups with close bonds.

RainforestFreshwater
3countries7parks44same family2featured routes

AI-generated images: illustrations, not photographs.

Fun facts

  • It is an excellent swimmer, able to cover up to 20 metres underwater without surfacing, and its fingers are partly webbed.
  • It feeds on young leaves, seeds and mangrove fruit, and occasionally on invertebrates such as caterpillars.
  • It lives in the mangroves, riverine forest and swamp forest of Borneo, always close to water.
  • anatomíaMales grow a strikingly large nose that amplifies their calls and may advertise social dominance and breeding fitness to females.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat and environment
Mangroves, riverine forest and swamp forest of Borneo, always close to water
Birth weight
~490 grams, with a deep blue face at birth
Size at birth
Deep blue face at birth, turning grey by about 2.5 months and adult cream by 8.5
Sexual maturity
Male: ~7 years | Female: ~4-5 years
Gestation / incubation
166-200 days (5.5-6.5 months)
Litter / clutch size
1 young per birth
Life expectancy in captivity
Documented record of up to 23-25 years in captivity

Sources consulted: IVIS · AnAge (genomics.senescence.info) · Dimensions.com · Biology Dictionary · Britannica · Animalia.bio · Animal Diversity Web · EBSCO Research Starters · PMC (vocal identity nose study)

Where to find it

Loading map…

The pins mark the parks where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Proboscis Monkey — same habitat, park, country, tags or family.

Same taxonomic family
Same taxonomic family
Same taxonomic family
Same taxonomic family
Shares a park
Shares a park

How to help

The proboscis monkey is classified as endangered. Organisations such as the IUCN, WWF and the Wildlife Conservation Society work specifically on its conservation and that of its habitat; looking into their programmes is a good starting point if you want to get involved.

It's documented in 5 protected areas — one reason why protecting these places matters for its conservation.

Keep exploring

Based on what we already know about proboscis monkey.

Share an experience, a fun fact or a tip for seeing the proboscis monkey.
See full glossary
This page in other languages: Español · Deutsch · Français · Português · Italiano
See its range on the interactive map→
Gunung MuluMalaysia
KinabaluMalaysia
Ulu TemburongBrunei
BakoMalaysia
Tanjung PutingIndonesia
NiahMalaysia
SimilajauMalaysia
Endangered

Southern Pig-tailed Macaque

Macaca nemestrina

Long-tailed MacaqueEndangered

Long-tailed Macaque

Macaca fascicularis

Silvery LutungVulnerable

Silvery Lutung

Trachypithecus cristatus

Endangered

Javan Surili

Presbytis comata

Endangered

Southeast Asian Box Turtle

Cuora amboinensis

Irrawaddy DolphinEndangered

Irrawaddy Dolphin

Orcaella brevirostris

CountriesMalaysia
ParksGunung MuluMalaysia
TagsHerbivore
Herbivore
Diurnal
Family group
Endangered
Rainforest
Freshwater
Mammal
Malaysia
Brunei
Indonesia