Kentucky ? The oldest male gorilla in a North American zoo celebrated his 50th birthday surrounded by females and snacking on fruit.

The Louisville Zoo had a party Saturday for Timmy, a silverback gorilla born in 1959. Zoo officials report he is the oldest male and is tied for fourth oldest gorilla overall in North America. They say it’s rare for male gorillas to reach his age.

Timmy and three female gorillas in his pack were given a 300-pound ice sculpture “cake” shaped like the number 50, with frozen fruit juices and other treats.

The Louisville Zoo says it has a total of 11 gorillas, including 51-year-old Helen, the third oldest gorilla in North America. More than 350 gorillas currently live in 52 zoos in North America.