Proboscis Monkey

Proboscis Monkey

Nasalis larvatus

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Daily sighting probability ~60% · Likely
at Bako National Park
42 Verified sightings at Bako National Park From 2019 to 2026
970 Verified sightings across all 6 parks From 2019 to 2026
May Best month highest sighting rate
🌅 Crepuscular When it's spotted at dawn and dusk

About 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. The proboscis monkey belongs to the subfamily Colobinae of the Old World monkeys. The two subspecies are: N. l. larvatus (Wurmb, 1787), which occupies the whole range of the species excluding northeast Kalimantan

N. l. orientalis (Chasen, 1940), restricted to north-east Kalimantan However, the difference between the subspecies is small, and not all authorities recognise N. l. orientalis. The genus name Nasalis comes from the Latin word nasus meaning "nose".

This animal was made known to Westerners by Baron Friedrich von Wurmb in 1781, he later sent specimens of it to Stamford Raffles in Europe. The proboscis monkey is a large species, being one of the largest monkey species native to Asia. Only the Tibetan macaque... Wikipedia →

Global Distribution

Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.

where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is)  ·  parks where it occurs — tap a pin for the sighting probability there

Parks Where Found

# Park Country Daily sighting probability
1 Kinabatangan Wildlife Sanctuary 🇲🇾 Malaysia
~80%
2 Tanjung Puting National Park 🇮🇩 Indonesia
~80%
3 Bako National Park 🇲🇾 Malaysia
~60%
4 Sepilok 🇲🇾 Malaysia
~40%
5 Kinabalu Park 🇲🇾 Malaysia
~10%
6 Danum Valley Conservation Area 🇲🇾 Malaysia
Insufficient data

Quick answers

What are the chances of seeing a Proboscis Monkey in Bako National Park?

About 60% of wildlife watchers report a Proboscis Monkey sighting in Bako National Park, based on 42 verified sightings from GBIF citizen-science data.

When is the best time to see Proboscis Monkey in Bako National Park?

May has the highest sighting rate for Proboscis Monkey in Bako National Park in our monthly data.

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