The common marmoset (Callithrix jacchus) is a small primate native to the forests of northeastern Brazil. It has distinctive white ear tufts, a banded tail, and a keen ability to adapt to various environments. Known for its social behavior, it lives in cooperative family groups and communicates through vocalizations and facial expressions.

Callithrix jacchus, commonly known as the common marmoset, is native to the northeastern region of Brazil. This area includes the states of Rio Grande do Norte, Ceará, Paraíba, Pernambuco, Alagoas, Sergipe, and Bahia.

The common marmoset typically inhabits tropical rainforests, but it can also be found in secondary forests and edge habitats. The climate in these regions is typically warm and humid, with significant rainfall throughout the year.

Callithrix jacchus is an arboreal species that occupies the canopy and understory layers of the forest. It primarily feeds on tree sap and gum, supplemented by fruits, insects, and small vertebrates. The species is well adapted to exploit disturbed habitats, which has facilitated its spread in urban and peri-urban areas.