Orangutan climbing

Orangutan climbing down a tree after a good night's rest.

Orangutan nest

Orangutan nest viewed from above

Bent branch

Orangutans bend growing branches to make their nests.

Orangutan Nest

An orangutan nest high up in the forest canopy.

Orangutan Nest

Researchers find a lazy orangutan, still sleeping in nest.

Researcher and orangutan nest

A researcher up in the trees by an orangutan nest.

Orangutans in the trees

Orangutans up in the trees

Orangutans in the trees

Orangutans in the trees.

Chimpanzee in nest

A chimpanzee lounging in his nest.

Researcher in chimp nest

A researcher taking over a chimpanzee nest.

Chimp nest

A chimpanzee in his nest.

Chimpanzee Nest

A chimpanzee nest in Kenya.

Young Chimpanzee

Fiona Stewart in a Chimp Nest

University of Cambridge Anthropologist Fiona Stewart perches in a chimp nest. Stewart spent 6 nights crashing in chimp nests to test what benefits sleeping in these assemblages brings to the apes.