The black-capped squirrel monkey (Saimiri boliviensis) is a South American squirrel monkey, found in Bolivia, Brazil and Peru. These monkeys live in multi-male, multi-female groups and are considered to be the most active, social and vocal of all the squirrel monkeys. They have a number of vocal calls, including warning sounds to protect themselves from large falcons, which are a natural threat to them. Their small body size also makes them susceptible to predators such as snakes and felids. They eat mainly insects, topped up with fruit and seeds.