Claudio Contreras / Central American Spider Monkey (Ateles geoffroyi) in tree, Punta Laguna, Otoch Ma'ax Yetel Kooh Reserve, Yucatan Peninsula, Mexico, October. Endangered species.

Claudio Contreras / Central American Spider Monkey (Ateles geoffroyi) orphan baby hanging from washing line. El Mirador- Rio Azul National Park, Department of Peten, Guatemala.

Claudio Contreras / Central American Spider Monkey (Ateles geoffroyi) juvenile, Punta Laguna, Otoch Ma'ax Yetel Kooh Reserve, Yucatan Peninsula, Mexico, October. Endangered species.

Thomas Marent / Black-handed Spider Monkey (Ateles geoffroyi) using prehensile tail, Belize

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

Claudio Contreras / Central American Spider Monkey (Ateles geoffroyi) with mouth open. Punta Laguna, Otoch Ma'ax Yetel Kooh Reserve, Yucatan Peninsula, Mexico, October. Endangered species.

Pete Oxford / Central American Spider Monkey (Ateles geoffroyi yucatanensis) in foliage. Coba Monkey Reserve, Yucatan Peninsula, Mexico.

Pete Oxford / Central American Spider Monkey (Ateles geoffroyi yucatanensis) in canopy. Yucatan Peninsula, Mexico.

David Tipling / Central American / Black handed spider monkey {Ateles geoffroyi} in forest, Tikal, Guatemala

David Tipling / Central American / Black handed spider monkey {Ateles geoffroyi} in forest, Tikal, Guatemala

Kevin Schafer / Black-handed Spider Monkey (Ateles geoffroyi) hanging in the trees, Calakmul Biosphere Reserve, Mexico

Ingo Arndt / Black-handed Spider Monkey (Ateles geoffroyi) jumping from tree to tree, Santa Rosa National Park, Costa Rica

Flip de Nooyer / Black-handed Spider Monkey (Ateles geoffroyi) hanging by prehensile tail, Guyana

Gerry Ellis / Black-handed Spider Monkey (Ateles geoffroyi) in tree eating Lobster Claw blossoms, Costa Rica

Gerry Ellis / Black-handed Spider Monkey (Ateles geoffroyi) in tree eating Lobster Claw blossoms, Costa Rica

Gerry Ellis / Black-handed Spider Monkey (Ateles geoffroyi) mother with baby in tree, Costa Rica

Gerry Ellis / Black-handed Spider Monkey (Ateles geoffroyi), Belize

Michael & Patricia Fogden / Black-handed Spider Monkey (Ateles geoffroyi) group in rainforest, Panama

Michael & Patricia Fogden / Black-handed Spider Monkey (Ateles geoffroyi) group in rainforest, Panama

Christian Ziegler / Black-handed Spider Monkey (Ateles geoffroyi) mother and young, Barro Colorado Island, Panama

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