Critter census at London Zoo
London - It's counting day at the London Zoo, and no one is exempt - not even tarantulas.
Each year the London Zoo has to take a detailed census of every living thing in its care to comply with its licence terms.
That means workers armed with clipboards and plenty of patience had to count every animal on Wednesday.
It's not easy when there are more than 18 000 animals at the site, and every one has to be accounted for.
Zoo manager Mark Habben says the count is a challenging task because many of the animals are very fast moving and are adept at hiding in their enclosures.