“Sometimes I feel like I’ve chosen the most difficult thing in the world to study,” Cheryl Knott tells me as we sit beneath the rain forest canopy at her orangutan research station in ...

The long time taken to reach sexual maturity, the long interbirth periods, and the fact that orang-utans normally give birth to just a single young mean that orangutans have an extremely low ...

Kubié says Siska’s birth in August was “a huge deal,” as Sumatran orangutans are a critically endangered species, with estimates putting the global population between 10,000 and 13,000.

A Como Zoo orangutan recently had a very interesting trip to the doctor. On Dec. 13, an orangutan named Markisa gave birth to a baby via Caesarean section at the University’s Veterinary Medical Center ...

They have a low reproductive rate, giving birth only once every 5-10 years, making it difficult to increase their numbers.