The black-handed spider monkey has a light to medium brown body and darker limbs, with the tail sometimes longer than the body. When the animal is on the lookout, it stands or walks on two feet, using the tail to hold on to a support. In the wild, the Spider monkey rarely comes down to the jungle floor.
- The black-handed spider monkey is one of the largest New World monkeys, often weighing as much as 9 kg (20 lb).
- Sounds produced by Geoffroy’s spider monkey include barks, whinnies, squeals, squeaks and screams. Barks are typically alarm calls. Whinnies and screams can be used as distress calls, and are also made at dawn and at dusk.