Laughing Animals in pictures

Monkey business - a crested macaque appears to smile while approaching the camera, in Tangkoko National Park, Sulawesi, Indonesi. Photograph: Anup Shah/Rex

Tiger tiger, gurning bright. An Amur tiger grins like a Cheshire, or Lancashire, cat at Blackpool Zoo. Photograph: Blackpool Zoo/Rex

 Aping around: three native Sunda Isles Orangutans see the funny side, in Borneo, Indonesia. Photograph: Corbis

Pig in a joke: villagers are given free pigs by local government officials in Guangxi Province, China. Photograph: HAP/Quirky China News/Rex

The cat must be away - this mouse has come out to play on top of a yarrow flower. (That's enough anthropomorphism, Ed) Photograph: Andrea Zampatti/HotSpot Media

 These newborn piglets already have a wicker sense of humor. Photograph: Image Source/Rex

Gull-ows humour. Two laughing Gulls are seen at South Padre Island, Texas, USA. Photograph: Tim Zurowski/All Canada Photos/Corbis

 Hoarse with laughter? Photograph: Alam

 Hot dog - a sun-loving pooch at the Key West Pet Parade. Photograph: Paul Brown/Rex

Once more unto the beach - a southern elephant seal appears happy to be by the sea, at Gold Harbour, South Georgia, Antarctic Peninsula. Photograph: Justin Hofman/Barcroft Media