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

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

Dave Watts / Colombian spider monkey (Ateles fusciceps rufiventris) group. Captive, Critically endangered species.

Dave Watts / Colombian spider monkey (Ateles fusciceps rufiventris) grooming another, captive. Critically endangered species.

Dave Watts / Colombian spider monkeys (Ateles fusciceps rufiventris) embracing each other, captive. Critically endangered species.

Roland Seitre / Colombian Spider Monkey (Ateles fusciceps rufiventris) mother with baby caged in zoo. Native to Colombia and Panama.

Eric Baccega / Group of Colombian Black Spider monkeys (Ateles fusciceps robustus) resting in a heap, captive, a vulnerable species native to Colombia and Panama

Eric Baccega / Group of Colombian black spider monkeys {Ateles fusciceps robustus} huddled together, sleeping on grass, captive.

Eric Baccega / Group of Colombian black spider monkies {Ateles fusciceps robustus} resting, captive.

Anup Shah / Spider monkey {Ateles fusciceps robustus} captive

Anup Shah / Spider monkey holding baby {Ateles fusciceps robustus} - captive

Anup Shah / Spider monkey portrait

Ugo Mellone / Colombian black spider monkey (Ateles fusciceps rufiventris) female, resting in tree, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian black spider monkey (Ateles fusciceps rufiventris) female, hanging from branch feeding on herbaceous plant (Philodendron sp.), Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian black spider monkey (Ateles fusciceps rufiventris) female, hanging from branch feeding on herbaceous plant (Philodendron sp.), Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian black spider monkey (Ateles fusciceps rufiventris) female, resting in tree with arms outstretched grabbing on to branches, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Two Colombian spider monkeys (Ateles fusciceps rufiventris) climbing in tree top, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian spider monkey (Ateles fusciceps rufiventris) female, carrying infant, climbing along branch, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian spider monkey (Ateles fusciceps rufiventris) female, carrying infant, climbing along branch, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian spider monkey (Ateles fusciceps rufiventris) female, sitting on branch looking down, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian spider monkey (Ateles fusciceps rufiventris) hanging between branches in forest, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian spider monkey (Ateles fusciceps rufiventris) female, sitting in tree, Marimonda, Necocli, Colombia. Endangered.

Ugo Mellone / Colombian spider monkey (Ateles fusciceps rufiventris) juvenile male, aged 3 years, sitting in tree, Marimonda, Necocli, Colombia. Endangered.