Like most macaques, this species is highly social.

Subspecies
Two subspecies.

Life span
Crested black macaques have a lifespan of 18 years.

Statistics
Body length: 44-60cm, Tail length: 2cm, Weight: Not known.

Physical description
Crested black macaques have black fur with a short tail, and long hair forms a pointed crest on their head. They have high, bony cheek ridges, a short tail and pink, heart-shaped rumps.

Distribution
Crested black macaques are native to Sulawesi (Indonesia).

Habitat
They live in tropical rainforest.

Diet
They feed on leaves, roots, sprouts, buds, fruit, insects and caterpillars. When foraging they tend to stuff food into their cheek pouches until they are full, and then stop to feed. Crested black macaques are important seed-dispersers.

Behaviour
They live in multi-male, multi-female groups, with an average of 1 male to 3.4 females. The males disperse from the troop when they reach maturity. The females spend more time grooming than the males. They are active during the day, and spend their time both in the trees and on the ground.

Reproduction
After a gestation period of 162-186 days, females give birth to one young, which weighs about 450g at birth.

Conservation status
Crested black macaques are considered to be Endangered, according to the IUCN Red List. They are hunted for food and are threatened by habitat loss.