PHILADELPHIA (CBS) – Time to break out the party favors.

The Philadelphia Zoo is celebrating a very special occasion for one of its most popular residents.

Today is the 31st birthday of Motuba, a western lowland gorilla.

The zoo treated him to a cake made of all of his favorite treats.

But unfortunately, Motuba didn’t get a chance to enjoy it. One of his female housemates swiped the cake and devoured it from a high platform in the enclosure.