Orangutan numbers plummet on Borneo

Updated February 16 2018 - 9:01am, first published 8:59am
In Borneo the orangutan population has plummeted, while Sumatran orangutans remain under threat.
In Borneo the orangutan population has plummeted, while Sumatran orangutans remain under threat.

A new study estimates that the orangutan population dropped by nearly 150,000 on Indonesia's Borneo island between 1999 and 2015.