Rapid decline of Tapanuli orang utan worrying

Rarest great ape: Fewer than 800 individuals remain across three tentatively connected sub-populations in a small mountainous region on the island of Sumatra, Indonesia.

A recently published study estimates that the Tapanuli orang utan only retains 2.5% of the range it occupied 130 years ago.

This new insight means that the species is in even more trouble than previously thought.