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#0226 · 🦊 mammals

Long-tailed Macaque

🇳🇱 Java-aap ·Macaca fascicularis

ENendangered 🦊 Mammals 📍 outside Europe
Long-tailed Macaque, photo 1 of 10
1/10 © Benjamin Koh · CC BY-NC 4.0

what is it?

The crab-eating macaque ( Macaca fascicularis ), also known as the long-tailed macaque and referred to as the cynomolgus monkey in laboratories, is a cercopithecine primate native to Southeast Asia. A species of macaque, the crab-eating macaque has a long history alongside humans; it has been alternately seen as an agricultural pest, sacred animal in some temples, and more recently, the subject of medical experiments.

base stats

  • NL sightings 0iNaturalist, research grade
  • worldwide 25,605iNaturalist observations
  • 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.
  • 25,605 observations worldwide on iNaturalist.
  • Scientifically named by Thomas Stamford Raffles in 1821 (205 years ago).
  • Listed as Endangered on the IUCN Red List.

fact sheet

English
Long-tailed Macaque
Nederlands
Java-aap
scientific name
Macaca fascicularis
class
Mammalia
order
Primates
family
Cercopithecidae
IUCN Red List
EN · endangered
sightings in NL
0
sightings worldwide
25,605
GBIF records in NL
0
weight
—
length
—
lifespan
—
named
1821 by Thomas Stamford Raffles

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

relatives· Cercopithecidae

Sources: iNaturalist taxon 43459, Wikidata Q301676, GBIF 2436603, Wikipedia (EN), Wikipedia (NL). Intro text from Wikipedia (CC BY-SA 4.0).Updated 2026-10-24.

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