A famous obese monkey is feared dead after he fell off a wagon that was transporting him to a weight loss camp.

Bizarre on Female First

Bizarre on Female First

The primate, dubbed Uncle Fatty, piled on the pounds after many years of being fed high calorie food by tourists visiting Khun Kala Monument, and now the animal has been lost in Bangkok, Thailand and was last seen alive on February 26 by environmentalists.

Concerned animal workers sent Uncle Fatty, 20, to a weight loss camp in 2017 to try to get him to shed the pounds but he fell off the wagon when he returned home.

We Love Monkey Club president Kavinaphat Mongkoltechachat said: ''They told me that when monkeys know that they're very weak, they will isolate themselves and won't let any other monkeys or anyone see them dying.

''He might have died of old age because Uncle Fatty has already lived beyond the age average. He also looked exhausted and didn't want to eat much.''