Hercules, (age 25 and weighs a staggering 95kg) was released to Orangutan Island in 2007, but was brought back to Nyaru Mentang in 2009 due to his old age. He can’t climb on the flooded island during the wet season and has become blind in one eye.
UPDATE Year 2013
Hercules, with his physical shortcomings, now has received the chance to be out of his enclosure and join the free life with his friends on the protected semi-wild island. More info at BOSF website.