In 2008, farmers in Northern Sumatra in Indonesia noticed that some of their crops were missing. It turns out, the culprit was an older female orangutan, pushed out of her habitat from the development of palm oil plantations. She was relying on their crops to survive.
Fearing that the orangutan would be killed for stealing crops, conservationists at the Sumatran Orangutan Conservation Programme (SOCP) captured the ape, whom they named Gober. They realized that she was blind in both eyes, and it was thought that she would never return to the wild again.
But in 2010, Gober met Leuser, a male orangutan who is also blind and who survived being shot 62 times with an air rifle by poachers. They were introduced through the bars of their enclosures and took to each other so quickly and seamlessly that they mated through the bars, according to Dr. Ian Singleton, director of the SOCP. The pregnancy resulted in a rare case of twins, he writes in his blog:
Cases of twins are rare in orangutans, but twin orangutans born to parents who are both blind is totally unheard of! Being such an experienced mother, and despite her handicap, Gober proceeded to rear both infants in exemplary fashion; Ganteng (meaning handsome, a male) and Ginting (a local karonese name, female).