Red-bellied tamarins, also known as white-lipped tamarins, are mostly dark brown in colour with red marks on their belly and chest and a white “moustache” around the nose and mouth. They are monomorphic, with all individuals looking alike. They are relatively small primates from the New World monkeys. They are diurnal animals and live in social groups of 4-15 individuals but usually consisting between 2 and 8. The group itself is made up of a breeding male and breeding female, along with their offspring and other male helpers. In the wild this species is known to form associations with other callitrichids such as Goeldi’s monkeys. This gives both species a stronger defence of their home-range. It equally ensures there is no competition of nesting sites or food as both species mainly forage in different forest layers.
They are a monogamous species with all juveniles in the group coming from the breeding pair. Helper individuals may leave the group during an intergroup encounter in order to become a breeder. They generally mate in spring and after a gestation period of 160 days before giving birth to 1 or 2 offspring. After 1 to 2 years the juveniles become independent.
There is no evidence for any major threats but forest destruction and fragmentation may have negative impacts on some of its range.