Goeldi’s monkeys are small, South American arboreal (live in trees) primates. Pelage (coat) is black and sometimes tipped with grey or brown. Goeldi’s are social animals and are known to have a group size as large as 12. In captivity, they live in smaller groups typically between 2-8 individuals. Callimico differs from other callitrichids such as marmosets and tamarins as the group can be made up of more than one breeding female.
Reproduction is arguably one of the most interesting aspects of the Callitrichidae. Goeldi’s monkey produce a single infant at birth, which the female carries for about the first 3 weeks. After this time, other individuals in the group will assist with rearing. Helper monkeys will share in the carrying of the infant until he or she can move about independently of others. This usually occurs when the individual is 42 days old.
Studies have suggested that the species will decline in the next 18 years primarily due to habit loss. Captive populations are managed as part of the European Endangered Species Programme (EEP).