London Zoo carries out its annual weigh-in of animals including Humboldt penguins, Asiatic lions, and Bactrian camels, with the data collected from over 10,000 animals and almost 400 species shared on a database with zookeepers across the globe in efforts to help the preservation of endangered species. The zoo recently drew headlines after a Banksy artwork was painted on the entrance, with the original removed for safeguarding and a replica put up. "We want to protect it properly and then we're going to get it on show again hopefully," says head of zoological operations Angela Ryan. IMAGES AND SOUNDBITES