Squirrel monkeys are a highly social species that live in large groups, sometimes reaching up to 300 individuals. They are a small primate who use many calls and scent marking to communicate with the group in the dense forest canopy.
They have a white mask of fur around their eyes, with dark brown or black around the mouth. Their fur is greyish brown in colour with yellow fur on their limbs.
Squirrel monkeys are extremely skilled climbers that spend most of their time high up in the tree canopy only occasionally coming down to the ground. Their long tail is not prehensile, it is used for balancing when jumping form tree to tree.
Squirrel monkeys play a key role in the ecosystem that they inhabit. By eating fruits, they carry out seed dispersal and therefore contribute to the healthy growth of plants in the rain forest.