Their body size is small. Their diet includes ants, termites, larvae, caterpillars, insect galls, and large-winged insects. This particular marmoset species does not feed on plant exudates as all other closely related marmoset species do. Gestation period is about 170 days, ranging from 138 days to 170 days. Behavior Callithrix aurita forms social groups.
Individuals can join or leave social groups when they please.
Because of their fur coloration and small in size, they are very agile and hard to detect and observe. They use all parts of the forest. They seem to prefer to forage below 5 meters. They don't come down to the ground unless they are feeding. They are prized by some Europeans.