Well, the staff at ZSL London Zoo are having a very busy time this week. This is because it's time for the annual stock-take of animals - in other words, all the animals have to be counted.
It's easy to count some...
The penguins will be harder to count, even if this one is still standing still...
So why do the annual stock-take?
It's a requirement of ZSL London Zoo's licence and it takes nearly a week to do. The information is shared with other zoos around the world via a database called Species360, and it's used to help management conservation breeding programmes for animals around the world.