Eric Baccega / Brown headed spider monkey (Ateles fusciceps) mother with baby, captive

Ingo Arndt / Black-handed Spider Monkey (Ateles geoffroyi) hanging by its prehensil tail in forest canopy, Santa Rosa National Park, Costa Rica

Anup Shah / Spider monkey in tree. Note prehensile tail

Anup Shah / Spider monkey calling

Rod Williams / Colombian black spider monkey, vulnerable species native to Colombia & Panama

Pete Oxford / Huaorani Indian woman with her pet White-bellied Spider Monkey (Ateles belzebuth). They would have hunted the mother for meat and raised the baby as their pet. Gabaro Community, Yasuni National Park,...

Pete Oxford / Huaorani Indian woman with her pet White-bellied Spider Monkey (Ateles belzebuth). They would have hunted the mother for meat and raised the baby as their pet. Gabaro Community, Yasuni National Park,...

Pete Oxford / Huaorani Indian woman with her pet White-bellied Spider Monkey (Ateles belzebuth). They would have hunted the mother for meat and raised the baby as their pet. Gabaro Community, Yasuni National Park,...

Eric Baccega / Portrait of Brown spider monkey (Ateles hybridus) sitting, captive

Nature Production / Spider Monkey {Ateles sp} hanging down with its tail looped around a branch, San Diego Zoo, California, USA

Nature Production / Spider Monkey {Ateles sp} balancing with its tail looped around a branch, San Diego Zoo, California, USA

Nick Gordon / Spider monkey calling and hanging from branch by prehensile tail (Ateles paniscus paniscus) Amazonia, Brazil