Both Johnny and Desi had rough starts to their lives. When they were young, people stole them from the forest and kept them as pets.
While orangutans can lose their ability to return to the wild if they're kept as pets for too long, Johnny and Desi were rescued in time. They were still able to learn - or rather, relearn - how to be wild.
Still, their rehabilitation process took time - four years, to be exact.
First they had to go to "forest school," where they learned skills in climbing, foraging and making nests, and where they also got to socialize with other orangutans. Once Johnny and Desi graduated from forest school, they were moved to IAR's pre-release island, where they were assessed to see if they were candidates for release.