The common marmoset is a tiny monkey from northeastern Brazil, recognised by its white ear tufts. It is highly adaptable and has spread to cities and forests far outside its native range.
Interesting facts
- White tufts of fur around the ears make it easy to recognise.
- It gnaws holes in tree bark with specialised teeth to feed on gum.
- Family members, including fathers and older siblings, help carry the young.
- It is widely used in brain and medical research.
- Marmosets introduced to Rio de Janeiro compete with native species.
- They communicate with many high-pitched calls and whistles.
Behaviour
Marmosets live in family groups of about 3 to 15. They are active by day and scamper through branches, gouging bark for gum and catching insects.
Breeding and young
Usually only the dominant female breeds, giving birth to twins about twice a year. The whole family helps raise them.
Threats and conservation
The species is not threatened. Where introduced, it threatens native wildlife and hybridises with other marmosets.
Where to see it
- Parks and forests of northeastern Brazil, such as in Recife and Salvador
- Sugarloaf Mountain and Tijuca Forest, Rio de Janeiro (introduced)
- Caatinga reserves in northeastern Brazil
- Zoos worldwide
Status source: IUCN Red List. Profile last reviewed September 2026.
