Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Peruvian spider monkey (Ateles chamek) is a species of spider monkey that lives not only in Peru, but also in Brazil and Bolivia. At two feet (0.6 m) long, they are relatively large among species of monkey, and their strong, prehensile tails can be up to three feet (1 m) long. Unlike many species of monkey, they have virtually no thumb. Peruvian spider monkeys live in groups of up to a dozen individuals called bands. They prefer to eat fleshy fruit, and this leads them to move among habitats, but they also eat small animals, insects and leaves based on availability. Females separate from the band to give birth, typically in the fall. Peruvian spider monkey are independent at about 10 months, with a lifespan of about 20 years.