In more footage released from the animal charity, Buti was seen gaining more strength during a physiotherapy session, as a veterinarian held up both his arms and lifted him from the ground swinging him to and fro.
Buti is also learning how to climb on a climbing frame placed in the rescue centre in preparation for his release into the wild.
The charity is currently caring for 83 orangutans of all ages that were being held illegally as pets. All animals are undergoing rehabilitation before being released into their natural habitat.