A squirrel Monkey seen during the Zoo's annual stocktaking.
LONDON, -, UNITED KINGDOM - 2019/01/03: A squirrel Monkey seen during the Zoo's annual stocktaking.
Caring for more than 700 different species, ZSL London Zoo's keepers face the challenging task of tallying up every mammal, bird, reptile, fish and invertebrate at the Zoo, counting everything from a troop of inquisitive squirrel monkeys to Critically Endangered Sumatran tigers and Bactrian camels. (Photo by Keith Mayhew/SOPA Images/LightRocket via Getty Images)