The world's first zoo-born gorilla had a swinging 56th birthday at her Ohio home, opening presents and munching on a host of tasty treats.

The Association of Zoos and Aquariums says Colo the western lowland gorilla is the oldest gorilla in any zoo. She was born at the Columbus Zoo and Aquarium in 1956.

The zoo marked mother-of-three Colo's birthday with a cake specially prepared for her and other gifts, including her favourite food - tomatoes.

The zoo included guests in the fun by having them sing Happy Birthday.

Colo's family tree includes more than two dozen descendants living at zoos across the US.

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