Saimiri is a genus of monkeys, they are called squirrel monkeys. The animals are very small, their size does not exceed 30 cm, the tail longer than the body, but grasping the function he performs, and serves as a balancer when moving. Due to bright spots around the eyes on a dark face squirrel monkeys are sometimes referred to as "dead head". They live in rain forests from Costa Rica in the North to Paraguay in the South.