Their red faces are a symbol of good health, and those with malaria have paler faces than those who are immune. This enables the monkeys to choose the healthiest mate to breed with.

Subspecies
Two. C.c.calvus (white fur), C.c.rubicundus (red fur)

Life span
20 years.

Statistics
Head and body length: Females: 54-57cm, Males: 54-56cm. Tail length: 15-16cm. Weight: Female: 2880g, Male: 3450g.

Physical description
Bald uakaris have little or no fur on the face and forehead, with pink to red facial skin. They have long, thick white or red body fur (depending on the subspecies), with distinctly short, bushy tails.

Distribution
Bald uakaris range throughout Brazil and Peru.

Habitat
They inhabit swampy, flooded forests.

Diet
The majority of bald uakaris' diet is made up of seeds, but they also feed on flowers, small animals and buds.

Behaviour
Bald uakaris live in multimale-multifemale groups, of around 5-30 members. They are diurnal and arboreal and have a home range of 500-600ha. Uakaris often spend time on the ground when searching for seeds and shoots to feed on. At night they sleep separately (except for mothers and infants) at the top of large trees. They move through the forest quadrupedally or by leaping.

Reproduction
The breeding season is between October and May, but the gestation period is unknown. The female encourages the male to mate with her by releasing olfactory signals.

Conservation status
Bald uakaris are considered to be Vulnerable by the 2002 IUCN Red List, due to the destruction of their habitat.