The Toronto Zoo‘s oldest orangutan, Molek, was euthanized on Wednesday.
According to a press release issued by the zoo, the 32-year-old Sumatran orangutan suffered complete renal failure and had to be put down.
Over the past several weeks, Molek showed signs of lethargy, loss of appetite and other symptoms. It was determined he was suffering from progressive kidney disease.
Zoo officials decided to euthanize the animal after his condition deteriorated and he refused medication.
“I would like to commend the orangutan keepers for their dedication and professionalism in caring for him during this difficult time,” zoo senior veterinarian Dr. Graham Crawshaw said in the release.
Molek was born at Zoo Atlanta in 1978 and came to Toronto in 1996 as part of the zoo’s species survival plan for Sumatran orangutan.
He is the oldest male of seven other members at the zoo and is among only 60,000 other orangutans estimated to still be left in the wild.