A group of trekkers had a once-in-a-lifetime experience when they encountered a family of endangered orangutans in Indonesia.
Footage captured in North Sumatra province shows close-ups of the orangutans climbing trees and hanging from liana vines.
The clearing of rain forests for oil palm plantations in Indonesia has destroyed the habitat for endangered species like the orangutans, which has been pushed to the verge of extinction.
The species has been assessed as critically endangered on the IUCN Red List since 2000.
