Crab-eating Macaque
Crab-eating MacaqueCrab-eating MacaqueCrab-eating MacaqueCrab-eating Macaque

Crab-eating Macaque

Macaca fascicularis

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
10–20% · With luck
overall probability at Khao Yai National Park
35 Verified records at Khao Yai National Park
April Best month highest sighting rate
🌅 Crepuscular When it's active at dawn and dusk

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. Wikipedia →

10–20% of wildlife watchers report a Crab-eating Macaque sighting in Khao Yai National Park, based on 35 days of visitor records from GBIF citizen-science data.

Closest Relatives at Khao Yai National Park

Northern Pig-tailed Macaque
VU

Northern Pig-tailed Macaque

🌅 Crepuscular Mammal

Macaca leonina

70–80% · Very likely
Stump-tailed Macaque
VU

Stump-tailed Macaque

🌅 Crepuscular Mammal

Macaca arctoides

Insufficient data
Indochinese Gray Langur
EN

Indochinese Gray Langur

Mammal

Trachypithecus crepusculus

Insufficient data
Lar Gibbon
EN

Lar Gibbon

🌅 Crepuscular Mammal

Hylobates lar

60–70% · Likely
Pileated Gibbon
EN

Pileated Gibbon

🌅 Crepuscular Mammal

Hylobates pileatus

20–30% · Possible
Bengal Slow Loris
EN

Bengal Slow Loris

☀️ Diurnal Mammal

Nycticebus bengalensis

10–20% · With luck

📅 Monthly Probability

20–30
Jan
10–20
Feb
5–10
Mar
30–40
Apr
20–30
May
10–20
Jun
20–30
Jul
10–20
Aug
20–30
Sep
<5
Oct
10–20
Nov
10–20
Dec

🌅 When They're Spotted

Most active at dawn and dusk · across all parks (global)

🌅Crepuscular
☀️🌙🌙12am6am12pm6pm12am

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 Probability
1 Kinabatangan Wildlife Sanctuary 🇲🇾 Malaysia
70–80%
2 Khao Sok National Park 🇹🇭 Thailand
70–80%
3 Way Kambas National Park 🇮🇩 Indonesia
50–60%
4 Bali Barat National Park 🇮🇩 Indonesia
50–60%
5 Cat Tien National Park 🇻🇳 Vietnam
40–50%
6 Danum Valley Conservation Area 🇲🇾 Malaysia
30–40%
7 Khao Yai National Park 🇹🇭 Thailand
10–20%
8 Kerinci Seblat National Park 🇮🇩 Indonesia
10–20%
9 Kinabalu Park 🇲🇾 Malaysia
10–20%
10 Kaeng Krachan National Park 🇹🇭 Thailand
Insufficient data

Quick answers

What are the chances of seeing a Crab-eating Macaque in Khao Yai National Park?

About 19% of wildlife watchers report a Crab-eating Macaque sighting in Khao Yai National Park, based on 35 days of visitor records from GBIF citizen-science data.

When is the best time to see Crab-eating Macaque in Khao Yai National Park?

April has the highest sighting rate for Crab-eating Macaque in Khao Yai National Park in our monthly data.

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