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Crab-eating Macaque
Macaca fascicularis
Silhouette: Jamie Whitehouse · PhyloPic
- KingdomAnimalia (Animals)
- PhylumChordata (Chordates)
- ClassMammalia (Mammals)
- OrderPrimates
- FamilyCercopithecidae (Old World Monkeys)
- GenusMacaca (Macaques)
- SpeciesMacaca fascicularis (Crab-eating Macaque)
In 3 days >90%
179 Verified sightings at Gunung Leuser National Park From 2019 to 2026
1,797 In all 15 parks
December Best month
🌅 Crepuscular When it's spotted
Completed
About the Crab-eating Macaque
Macaca fascicularis, variously known by common names such as crab-eating macaque, long-tailed macaque, or cynomolgus monkey, is a macaque species native to Southeast Asia. As a synanthropic species, the crab-eating macaque thrives near human settlements and in secondary forests. The crab-eating macaque has developed a variety of cultural perceptions, from being smart and adaptive, to being sacred, to even being pests in some cases.
The crab-eating macaque is omnivorous and frugivorous. It lives in matrilineal groups ranging from 10 to 85 individuals, with groups exhibiting female philopatry and males emigrating from natal group at puberty. The crab-eating macaque is the only old-world monkey known to use stone tools in their daily foraging, and it engages in a robbing and bartering behavior in some tourist locations.
The crab-eating macaque is the most traded primate species and also the most popular species used in scientific research. Due to these threats, the crab-eating macaque was listed as Endangered on the IUCN Red List in 2022.
Macaca comes from the Portuguese word macaco, which was derived from makaku, a word in Ibinda, a language of Central Africa (kaku means... Wikipedia →
Recent sightings of Crab-eating Macaque in Gunung Leuser National Park
LIVEiNaturalistGlobal Distribution
Parks Where Found
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tanjung Puting National Park | 🇮🇩 Indonesia | |
| 2 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 3 | Khao Sok National Park | 🇹🇭 Thailand | |
| 4 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 5 | Bako National Park | 🇲🇾 Malaysia | |
| 6 | Bali Barat National Park | 🇮🇩 Indonesia | |
| 7 | Komodo National Park | 🇮🇩 Indonesia | |
| 8 | Way Kambas National Park | 🇮🇩 Indonesia | |
| 9 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 10 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 11 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 12 | Sepilok | 🇲🇾 Malaysia | |
| 13 | Khao Yai National Park | 🇹🇭 Thailand | |
| 14 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 15 | Kinabalu Park | 🇲🇾 Malaysia |
Zoos & Centres Where Found
Closest Relatives at Gunung Leuser National Park
Before you go
What are the chances of seeing a Crab-eating Macaque in Gunung Leuser National Park?
Very likely
About 70% of wildlife watchers report a Crab-eating Macaque sighting in Gunung Leuser National Park on a given day, based on 179 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 3rd most-seen of the 19 mammals we can rate there. Over three days the chance rises to over 90%, if each day is a fresh chance.
When is the best time to see a Crab-eating Macaque in Gunung Leuser National Park?
April, August and November–January
In those months about 80% of wildlife watchers report a Crab-eating Macaque in Gunung Leuser National Park on a given day, against about 60% in March and October, the lowest months.
What time of day is best to see a Crab-eating Macaque?
Between 4 and 7 am
Across all the parks we cover, that three-hour window holds the most Crab-eating Macaque sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Is Gunung Leuser National Park the best place to see a Crab-eating Macaque?
Among the best
Of the 15 parks where we can rate Crab-eating Macaque sightings, Gunung Leuser National Park ranks 2nd at about 70%, level with the leaders once rounded. The best odds are in Tanjung Puting National Park (Indonesia, about 70%). All parks ranked.
Where does the Crab-eating Macaque sighting chance come from?
GBIF citizen-science records
It is estimated from how often the Crab-eating Macaque is recorded against all the mammals logged in Gunung Leuser National Park (179 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
