Capuchin monkeys are extremely intelligent creatures who are known to use stones as tools to get into nuts and shell fish. Generally, capuchins weigh between 2.5 - 4 kilograms, depending on the species. Their habitat is mainly found in large areas of Brazil. The oldest age recorded for the White headed Capuchin is 54 years. Their enemies are Eagles, and other large birds of prey, and wild cats like the Jaguar.