Proboscis monkey
Nasalis larvatus (van Wurmb, 1787)
The proboscis monkey (Nasalis larvatus), also called the nasal ape or long-nosed monkey, is a primate of the family Cercopithecidae and subfamily Colobinae. It is a medium-sized mammal with an adult body mass of 9 kg, and our sources report values up to 20.72 kg.
Quick facts about the proboscis monkey
The proboscis monkey is a diurnal, scansorial herbivore. It is listed as Endangered on the IUCN Red List, an IUCN threatened category.
- Weight
- 9 kg – 20.7 kgsrc for Weight
- Length
- Not recorded
- Lifespan
- 21 years – 25.1 yearssrc for Lifespan
- Diet
- Herbivoresrc for Diet
- Main food
- Not recorded
- Habitat
- coastal, forestsrc for Habitat
- Gestation
- 167 dayssrc for Gestation
- Young per litter or clutch
- 1.01src for Young per litter or clutch
- Age at maturity
- 4.5 yearssrc for Age at maturity
- Litters or clutches a year
- 0.7src for Litters or clutches a year
- Active
- By day (diurnal)src for Active
- Lifestyle
- Scansorialsrc for Lifestyle
- Conservation status
- Endangered (IUCN)src for Conservation status
- Countries on record
- Not recorded
Photos of the proboscis monkey
Only freely licensed photos are shown. Each carries its creator and licence.
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Where does the proboscis monkey live?
Not recorded
What is the proboscis monkey?
The proboscis monkey or long-nosed monkey (Nasalis larvatus) is an arboreal Old World monkey with an unusually large nose (or proboscis), a reddish-brown skin color and a long tail. It is endemic to the Southeast Asian island of Borneo and is found mostly in mangrove forests and on the coastal areas of the island.
This species co-exists with the Bornean orangutan and monkeys such as the silvery lutung. It belongs in the monotypic genus Nasalis.
From the Wikipedia article “Proboscis monkey” (en.wikipedia.org/w/index.php?title=Proboscis_monkey&oldid=1379340219), by Wikipedia contributors, licensed under CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0). This block is kept separate from our own text.
Is the proboscis monkey endangered?
The proboscis monkey is listed as Endangered on the IUCN Red List: it faces a very high risk of extinction in the wild.
- LCLeast Concern
- NTNear Threatened
- VUVulnerable
- ENEndangered
- CRCritically Endangered
- EWExtinct in the Wild
- EXExtinct
Category via Wikidata (CC0). Find the full assessment on the IUCN Red List. See all Endangered species.
How is the proboscis monkey classified?
- kingdomAnimalia
- phylumChordata
- classMammalia
- orderPrimates
- familyCercopithecidae
- genusNasalis
- SpeciesNasalis larvatus (van Wurmb, 1787)
Synonyms Cercopithecus larvatus, Cercopithecus nasica, Nasalis capistratus, Nasalis larvatus orientalis, Nasalis nasica, Nasalis recurvus, Simia capistratus
Other names and names in other languages (40)
- Long-nosed monkeyEnglish
- Long-nosed monkeyEnglish
- Nasal apeEnglish
- قرد الململةArabic
- قرد طويل الانفArabic
- kahau nosatýCzech
- næseabeDanish
- NasenaffeGerman
- Προβοσκιδωτός ΠίθηκοςGreek
- Mono NarigudoSpanish
- Nasalis larvatusSpanish
- Tximino sudurrandiBasque
- nenäapinaFinnish
- NasiqueFrench
- Long nezFrench
- Semnopithèque nasiqueFrench
- Singe à trompeFrench
- קוף חוטםHebrew
- borneói nagyorrúmajomHungarian
- BekantanIndonesian
- Monyet BelandaIndonesian
- nasicaItalian
- Nasica comuneItalian
- Nasica nordorientaleItalian
- Scimmia dalla proboscideItalian
- テングザルJapanese
- ცხვირა მაიმუნიGeorgian
- 코주부원숭이Korean
- Didnosė beždžionėLithuanian
- Kera BekantanMalay
- NeseapeNorwegian Bokmål
- NeusaapDutch
- Nosacz sundajskiPolish
- Macaco-narigudoPortuguese
- НосачRussian
- Мајмун НосоњаSerbian
- NäsapaSwedish
- ลิงจมูกยาวThai
- Uzun burunlu maymunTurkish
- 長鼻猴Chinese
Relatives of the proboscis monkey
Other species in the same family Cercopithecidae.
Rhesus macaque
Macaca mulatta
Barbary macaque
Macaca sylvanus
Mandrill
Mandrillus sphinx
Japanese macaque
Macaca fuscata
Hamadryas baboon
Papio hamadryas
Olive baboon
Papio anubis
CompareProboscis monkey vs Rhesus macaqueProboscis monkey vs Barbary macaqueProboscis monkey vs MandrillProboscis monkey vs Japanese macaque
Common questions
Each answer is written from the sourced facts on this page, and only where they hold the answer.
What kind of animal is the proboscis monkey?
The proboscis monkey is a primate in the family Cercopithecidae and subfamily Colobinae. It belongs to the class Mammalia.
How heavy is a proboscis monkey?
An adult proboscis monkey has a body mass of 9 kg. The highest value reported by our sources is 20.72 kg.
What does the proboscis monkey eat?
The proboscis monkey is a herbivore.
Is the proboscis monkey endangered?
Yes. The proboscis monkey is listed as Endangered (EN) on the IUCN Red List, an IUCN threatened category.
How long does a proboscis monkey live?
The proboscis monkey has a lifespan of 21 years, and our sources report values up to 25.1 years.
How many young does a proboscis monkey have?
A proboscis monkey has 1 young per litter, with 0.7 litters per year. Gestation lasts 167.2 days.
When does a proboscis monkey reach sexual maturity?
The proboscis monkey reaches sexual maturity at 4.5 years (1,644 days).
Who named the proboscis monkey?
The scientific name Nasalis larvatus is attributed to (van Wurmb, 1787).
Sources and how to cite this page
Data as of 2026-11-11. How this page is put together.
- An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles · CC0 1.0 · E096-269
Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1 - Catalogue of Life eXtended Release · CC BY 4.0 · 2026-10-16 XR
Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf - Wikimedia Commons · per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed) · 2026-11-11
Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence). - EltonTraits 1.0: species-level foraging attributes of the world's birds and mammals · CC0 1.0 · 1.0
Wilman, H., Belmaker, J., Simpson, J., de la Rosa, C., Rivadeneira, M.M. & Jetz, W. (2014) EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95: 2027. https://doi.org/10.1890/13-1917.1. Data: https://doi.org/10.6084/m9.figshare.3559887.v1 - Wikidata · CC0 1.0 · 2026-11-11
Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service). - Wikipedia (English) · CC BY-SA 4.0 · 2026-11-11
Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).
Embed a card for this animal on your own site
Copy this code. The card shows the photo with its credit, key facts and a link back to this page.
CreatureData. (2026). Proboscis monkey (Nasalis larvatus). Retrieved from https://creaturedata.com/animals/proboscis-monkey
“Proboscis monkey (Nasalis larvatus).” CreatureData, 2026, https://creaturedata.com/animals/proboscis-monkey.
@misc{proboscis_monkey_2026,
title = {Proboscis monkey (Nasalis larvatus)},
author = {{CreatureData}},
year = {2026},
url = {https://creaturedata.com/animals/proboscis-monkey},
note = {Data as of 2026-11-11}
}