As with most marmosets and tamarins, the male helps the female to rear the young. This is probably because both parents are needed to carry the young.

Subspecies
Two.

Life span
Unknown.

Statistics
Head and body length: 23-30cm, Tail length: 34-41cm, Weight: Female: 38-49.5g, Male: 39-50.5g.

Physical description
Red-bellied tamarins have white hair around the lips and nose, with black head hair, a brown-black back and red-orange under-parts.

Distribution
They range across a small strip in Brazil and Peru.

Habitat
Red-bellied tamarins have a preference for primary forests or undisturbed secondary forests, as well as swamps and flooded forest.

Diet
They feed on fruit, gums, insects and nectar.

Behaviour
Red-bellied tamarins live in groups of one female and numerous males, or multimale-multifemale, with just one reproducing female. Group size ranges from 2-13 members. They are diurnal and arboreal, moving quadrupedally through the forest and spending 90 per cent of their time above 10m.

Reproduction
Females give birth after a gestation period of 140-145 days. 1-2 young are born between October and December.

Conservation status
Red-bellied tamarins are not listed by the IUCN.