The Tapanuli Orang-utan is one of just three Orang-utan species in the world (the other two being the Bornean Orang-utan and the Sumatran Orang-utan).

The zoo takes part in the Southern White Rhino Species Survival Plan.

The Sumatran Orang-utan (along with the Bornean Orang-utan and the Tapanuli Orang-utan) is one of Humans' closest living relatives and we in fact share 96.4% of our DNA with them.

Banner image of an African elephant by John C. Cannon/Mongabay.

Banner image of elephants on the Kinabatangan River by John C. Cannon/Mongabay.

Banner image of an African elephant in Tanzania by John C. Cannon/Mongabay.

Banner image of a drill in Cameroon by John C. Cannon/Mongabay.

Like the Bornean Orang-utan and the Sumatran Orang-utan, the Tapanuli Orang-utan is actually so similar to humans that it led to them being known locally as Orang Hutan which literally means "forest person" in local dialect.

Tapanuli Orang-utans are similar in appearance to both the Bornean Orang-utan and the Sumatran Orang-utan but are slightly smaller in size and the males have smaller cheek pouches compared to their Bornean cousins.

The Sumatran Orang-utan is more threatened than the Bornean Orang-utan with hunting and habitat loss having decimated populations throughout much of their once vast natural range.

The Bornean Orang-utan tends to be slightly larger in size than the Sumatran Orang-utan, which is more lightly coloured along with having a longer beard than its cousin.

The Sumatran Orang-utan tends to be slightly smaller in size than the Bornean Orang-utan, with generally lighter coloured orange-red hair and a longer beard than its cousin.

Borneo - The Borneo orangutan is a critically endangered species.

The traumatized ape was then taken to a nearby orangutan sanctuary operated by the Borneo Orangutan Survival Foundation, the report said.

The Sumatran orangutan is more endangered than the Borneo orangutan.