What do spider monkeys use their tail for?

Spider monkeys use their tails primarily as an extra limb for grasping and balancing while navigating through the trees. Their prehensile tails are highly flexible and can grip branches, allowing them to swing from tree to tree with agility. This adaptation is crucial for their arboreal lifestyle, helping them to forage for food and avoid predators. Additionally, their tails assist in maintaining stability while climbing and moving through their forest habitat.