Long-tailed Macaque (Macaca fascicularis)

OTHER NAMES: Crab-eating Macaque, Cynomolgus Monkey

Latin Etymology: Macaca ("macaque") fascicularis ("with a small band")

Two Long-tailed Macaque (subspecies M. f. fascicularis) at Batu Caves, Malaysia - July 2016

Featured Subspecies: Macaca fascicularis fascicularis
Weight: 4.7-8.3kg  /  Length: 41-64cm + 40-65cm tail
NO UK STATUS / IUCN Red List: Least Concern

By far the most common of the primates of Malaysia, the Long-tailed Macaque is a species that has adapted well to human living, and I saw them in three separate sites in Kuala Lumpur itself.  Though their alternate name is the Crab-eating Macaque they are found in a wide variety of habitats, not just the shoreline and in some place become abundant where they can scavenge from humans such as the Batu Caves temple area to the North of Kuala Lumpur where densities of this species were very high.

Related Species:
Order: Primates
Family: Cercopithecidae
Genus: Macaca
SUBSPECIES: M. f. fascicularis, M. f. aurea, M. f. umbrosa, M. f. atriceps, M. f. condorensis, M. f. fusca, M. f. lasiae, M. f. tua, M. f. karimondjawae, M. f. philippensis 

 - Sighting Locations -

MALAYSIA - Malay - Kera ("Ape")

A common resident

 - MALAYSIA/SINGAPORE 2016 TRIP: Abundant in Kuala Lumpur

SINGAPORE 

A common resident.

 - CAMBODIA/SINGAPORE 2019 TRIP: Seen around Lower Pierce Reservoir and surrounding area

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto .

Panamanian White-faced Capuchin (Cebus imitator)

OTHER NAMES: Panamanian White-headed Capuchin
Latin Etymology: Cebus ("long-tailed monkey") imitator ("mimic")

Panamanian White-faced Capuchin (Cebus imitator) at Tarcoles, Costa Rica - November 2025

Featured Subspecies: N/A

Weight: 3.9kg  /  Length: up to 100cm

NO UK STATUS /IUCN Red List: Vulnerable

A versatile species of monkey that lives in troops which can exceed 20 individuals. It is considered to be an intelligent and adaptable species with records of not only tool use but seemingly rudimentary herbal medicine and even weapons. They are also long lived, with an individual on record having lived to over 54 years. They are omnivores, but the majority usually consists of fruit, of which they have been recorded eating at least 95 different species.
 
Related Species: 
Order: Primates
Family: Haplorhini
Genus: Cebus
SUBSPECIES: none - monotypic 
 
- Sighting Locations -

COSTA RICA 
A widespread resident
- COSTA RICA 2025 TRIP: Seen at Tarcoles and Carara

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto

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