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#0363 · 🦊 mammals

Proboscis Monkey

🇳🇱 Neusaap ·Nasalis larvatus

ENendangered 🦊 Mammals 📍 outside Europe
Proboscis Monkey, photo 1 of 10
1/10 © Sergey Pisarevskiy · CC BY-NC-SA 4.0

what is it?

The proboscis monkey ( Nasalis larvatus ) or long-nosed monkey , known as the bekantan in Indonesia, is a reddish-brown arboreal Old World monkey with an unusually large nose. It is endemic to the southeast Asian island of Borneo.

base stats

  • NL sightings 0iNaturalist, research grade
  • worldwide 3,710iNaturalist observations
  • weight 455 gadult, up to
  • threat ENendangered

Bars compare against all animals on log scales: up to 300,000 Dutch and 600,000 worldwide sightings (the most-seen species), 150 t (blue whale), 30 m and 400 years (Greenland shark).

fun facts

  • No confirmed wild sightings in the Netherlands on iNaturalist: you'd have to travel for this one.
  • 3,710 observations worldwide on iNaturalist.
  • Weighs only about 455 g.
  • Scientifically named by Friedrich von Wurmb in 1787 (239 years ago).
  • Listed as Endangered on the IUCN Red List.

fact sheet

English
Proboscis Monkey
Nederlands
Neusaap
scientific name
Nasalis larvatus
class
Mammalia
order
Primates
family
Cercopithecidae
IUCN Red List
EN · endangered
sightings in NL
0
sightings worldwide
3,710
GBIF records in NL
0
weight
455 g
length
—
lifespan
—
named
1787 by Friedrich von Wurmb

IUCN in Dutch: bedreigd. Blank means the sources don't say.

relatives· Cercopithecidae

Sources: iNaturalist taxon 43538, Wikidata Q192029, GBIF 2436525, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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