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White-bellied pygmy marmoset

Callithrix pygmaea nivieventris

Pygmy marmosets are New World monkeys, which is a term that describes monkeys from South and Central America.

Pygmy marmosets are the smallest members of the monkey family, at just 13 centimetres long. In fact, a newborn infant is only the size of the head of a toothbrush.

A family group of pygmy marmosets is made up of an adult male and female and their offspring, of varying ages. The adult male and older offspring are responsible for carrying the newborns, while the female is responsible for feeding her young.

Belfast Zoo’s pygmy marmosets can be found in the Western lowland gorilla house, with the largest primates in the world!

Animal class


Conservation status

The IUCN believe that pygmy marmosets are currently under threat of extinction in the wild. They are listed under Appendix II of CITES.




Pygmy marmoset numbers are declining but they seem to be able to adapt to less of their natural habitat. This may help prevent a drastic decline in population.


Omnivore. Pygmy marmosets eat tree sap and gum, some small invertebrates and fruit.