Squirrel monkeys are extremely agile and fast. Unlike a spider monkey, their tail is not used for climbing, but as a kind of "balancing pole". They eat mainly fruit and insects but also invertebrates, flowers, leaves and seeds.
During mating season, males gain considerable amounts of weight. This is known as "fattening”. The fatter the animal the more attractive it is to a female.
Our group of Bolivian squirrel monkeys live in The Rainforest with our capybara.