Kumbuka, a 15-year-old western lowland gorilla, eats a green pepper as he explores his new enclosure in London zoo

Photograph: Oli Scarff/Getty Images

(Source: Guardian)

Jae Jae, a five year old Sumatran tiger, climbs a tree as he tries to reach an easter themed treat at London Zoo

Picture: George Henton / Barcroft Media

A meerkat examines the snow at ZSL London Zoo.

Picture: Lauren Baily

Penguins assemble to be counted at London Zoo’s annual stocktake

Picture: EDDIE MULHOLLAND

ZSL London Zoo’s meerkats post insect-stuffed letters to Santa into a miniature postbox

Picture: ZSL / Rex Features

Lucifer the lion holds a Christmas present in his mouth on a frosty morning at ZSL London Zoo

Picture: Dan Kitwood/Getty Images

Dirk the Galapagos tortoise

Picture: London Zoo/Rex Features

Sumatran tiger Jae Jae enjoys a pumpkin treat at London Zoo

Picture: Tony Kyriacou / Rex Features

Komodo dragon Raja investigates a Halloween pumpkin at London Zoo

Picture: Tony Kyriacou / Rex Features

Bill Oddie translates bird call into tweets at ZSL London zoo. According to Oddie, trained ears can pick up on the subtle differences that alter the meaning of a bird call. ‘Every bird has a bit of a vocabulary. They have seven different areas of sound, and they will all have meaning. It might be a young bird asking for food, or a bird saying this is my territory,’ he said

Photograph: Jeff Moore/PA

(Source: Guardian)

Alexandra Roberts: It was the symmetry of these two sleeping pigs at London Zoo that caught my eye initially. And the fact that they looked so peaceful!

(Source: Guardian)

Wira, a newborn rare male baby Sulawesi crested macaque, is held by his mother Wino at ZSL London Zoo. Born with bright blue eyes and pale skin, Wira’s features will get darker with age, his eyes will turn brown and he’ll also develop the macaque’s familiar crest of hair on his head.Picture: REUTERS/ZSL London