Crab-Eating Macaque

• Common Name: Crab-eating Macaque
• Taxonomy Classification Year: 1821
• Monkey Size: 40 to 47 cm (15.75 to 18.50 in)
• Skin Color(s): Gray or red-brown
• Habitat: Forest, rainforest, scrub forest
• Diet: Omnivorous
• Native Countries: Myanmar, Philippines, Malaysia, Indonesia, Thailand

The crab-eating macaque^[1], also called the long-tailed macaque and known in laboratories as the cynomolgus monkey, is a primate monkey endemic to Southeast Asia.

• The body fur of long-tailed macaques is usually gray-brown to red-brown. These colors are always lighter ventrally.
• The face is brownish gray with whiskers on the cheeks. The eyes of these Asian monkeys are directed forward for binocular vision.
• With a flatter nose and narrow nostrils, Crab-eating macaques have shovel-shaped incisors, prominent canines, and bilophodont molars.
• The gray-brown or reddish tail measures 50-60 cm. Crab-eating macaques show sexual dimorphism in their sizes.
• The average weight of males is 4.8-7 kg, and that of females 3-4 kg, about 69% of the average weight of males.

The Crab-eating Macaques consume many plant/tree sources including^[¶]:

• Monkey Jack (Artocarpus rigidus).
• Pulasan (Nephelium lappaceum)
• Fig (Ficus)
• Bishopwood (Bischofia javanica)
• Cowa Fruit (Garcinia cowa).
• Jacareuba (Calophyllum brasiliense)
• Weeping Fig (Ficus benjamina).
• Clustertree (Ficus racemosa)
• Javanese Treebine (Cissus nodosa).
• Argus Pheasant Tree (Dracontomelon dao).
• Council Tree (Ficus altissima).
• Oriental Trema (Trema orientalis).
• Ilang-Ilang (Cananga odorata)
• Brown-Woolly Fig (Ficus drupacea).
• Parasol Leaf Tree (Macaranga tanarius).
• Myrobalan (Terminalia bellirica)
• Abas (Psidium guajava)
• Chempedak (Artocarpus integer)
• Kaurasiga (Clidemia hirta)
• Malabar Melastome (Melastoma malabathricum).
• Betel Palm (Areca catechu).
• Keruing (Dipterocarpus caudatus)
• Durian (Durio zibethinus)
• Redberry Stopper (Eugenia confusa).
• Bachang (Mangifera foetida)
• Golden Bellapple (Passiflora laurifolia).
• Tanoak (Lithocarpus)
• Carambola (Averrhoa carambola)
• Auri (Acaciaia auriculiformis)
• Common Rengas (Gluta wallichii).
• Starrush Whitetop (Rhynchospora colorata).
• Sea Apple (Syzygium grande).
• Mango (Mangifera indica)
• Bitter Cassava (Manihot esculenta).
• Kwini (Mangifera odorata)
• Agarwood (Aquilaria malaccensis)
• African Oil Palm (Elaeis guineensis).
• Jackfruit (Artocarpus heterophyllus)
• Yam (Dioscorea)
• Dark Red Meranti (Shorea curtisii).
• Barrelier’s Woodsorrel (Oxalis barrelieri).
• Rattan (Calamus rotang)
• Coconut Palm (Cocos nucifera).
• Moonlight Cactus (Selenicereus)

• Crab-eating macaque macaques live in multi-male groups comprising around 30 members.
• As with all primates, there is a long period of juvenile dependence. The females are the ones that take the most care of the young.
• Despite aggression between males, this species is characterized by a general lack of aggression between groups.
• Within groups, males develop a strictly linear dominance hierarchy. This hierarchy is determined by size, age, and combat ability.
• These macaques are unique among other nonhuman primates due to their ability to display cultural or learned behaviors. This cultural behavior has been observed in the food preparation of crab-eating macaques.