bare-eared squirrel monkey

The bare-eared squirrel monkey (Saimiri ustus) is a species of squirrel monkey native to central Brazil. Squirrel monkeys, in general, are small, soft-haired primates found in South American riverside forests. They are distinguished by a circle of black skin around their nose and mouth, set against a white face. Their fur is typically gray to olive green with whitish underparts, and they possess a long, nonprehensile tail.

These monkeys are known for forming large social groups, sometimes numbering in the hundreds, and are highly vocal, using at least 26 different calls. They are agile, arboreal animals, active during the day, and sleep huddled together at night. Their diet is omnivorous, including fruits, leaves, insects, and small vertebrates. Females give birth to a single offspring, which rides on their back for the first few weeks.12