London Zookeeper Adrian Walls poses for a picture with penguins as he takes part in a photocall to promote London Zoo's annual stock take of animals on January 4, 2012 in London, England. The zoo's stocktake takes place annually, and gives keepers a chance to check on the numbers of every one of the animals from stick insects and frogs to tigers and camels. (Photo by Dan Kitwood/Getty Images)

A Red-Kneed Spider rests on a zookeeper's hand during a photocall to promote London Zoo's annual stock take of animals on January 4, 2012 in London, England. (Photo by Dan Kitwood/Getty Images)

A zookeeper feeds Squirrel monkeys as he takes part in a photocall to promote London Zoo's annual stock take of animals on January 4, 2012 in London, England. (Photo by Dan Kitwood/Getty Images)

Jungle Nymphs rest on a zookeeper's hand during a photocall to promote London Zoo's annual stock take of animals on January 4, 2012 in London, England. (Photo by Dan Kitwood/Getty Images)

A Bactrian camel spits in a zookeepers face during a photocall to promote London Zoo's annual stock take of animals on January 4, 2012 in London, England. (Photo by Dan Kitwood/Getty Images)

A Waxy Tree Frog rests on a zookeeper's hand during a photocall to promote London Zoo's annual stock take of animals on January 4, 2012 in London, England. (Photo by Dan Kitwood/Getty Images)