An adult female Sumatran orangutan creates a bridge between two trees for her baby (approx 1 year old) to cross a large gap.

The Sumatran orangutan (Pongo abelii) is Critically Endangered (IUCN) and only found in pockets of the Indonesian island of Sumatra.

Gunung Leuser National Park, Bukit Lawang, Sumatra, Indonesia.

Photo: Andrew Walmsley
16/04/14