Photos: Counting critters at the London Zoo

A zoo keeper sits in an observation window as he counts penguins at London ZSL Zoo. Caring for more than 500 different species, the Zoo's keepers face the challenging task of tallying up every animal large and small, every mammal, bird, reptile, fish and invertebrate at the Zoo.

A zookeeper counts the squirrel-monkeys during the annual stocktake at ZSL London Zoo in London

A barn owl is seen during the annual stocktake at ZSL London Zoo in London

An Asiatic lion is seen during the annual stocktake at ZSL London Zoo in central London

A zookeeper holds up a Giant African land snail during the annual stocktake at ZSL London Zoo

Bhanu, an Asiatic lion is seen during the annual stocktake at ZSL London Zoo

A zookeeper interacts with camels during the annual stocktake at ZSL London Zoo in London

A zookeeper interacts with penguins during the annual stocktake at ZSL London Zoo

A zookeeper counts Pygmy goats during the annual stocktake at ZSL London Zoo

Members of the media photograph a mexican red-kneed spider during the annual stocktake at ZSL London Zoo in London

A zookeeper holds up a Red Kneed tarantula during the annual stocktake at ZSL London Zoo in central London on January 2, 2020. / AFP / DANIEL LEAL-OLIVAS

Owlberta, a Tawny Owl is carried by a zookeeper during the annual stocktake at ZSL London Zoo

Heidi the lion is seen during the annual stocktake at ZSL London Zoo in London

A zookeeper counts Bactrian camels during the annual stocktake at ZSL London Zoo

A zookeeper feeds a Humboldt penguin during the annual stocktake at ZSL London Zoo

A barn owl is seen during the annual stocktake at ZSL London Zoo in London

A Humboldt penguin is seen during the annual stocktake at ZSL London Zoo in central London