Spider Monkeys are quite large, reaching up to **5 ft (76 cm)** in length and weighing up to **21 lbs (
5 kg)**. They have long limbs, a prehensile tail, and opposable thumbs. Their fur is predominantly black, but they have a bare, distinctive face with white fur around the eyes, mouth, and nose.
Spider Monkeys live in groups of up to 40 individuals, and they are highly social animals. They eat mostly fruits and insects, but also some leaves and tree bark.
They spend much of their time in the trees, using their long arms and prehensile tail to move and jump from branch to branch.