From giant tortoises to tiny snails, animals of every size are stepping up to the scales at London Zoo. Tempted with fish, carrots or cabbage, they’re taking part in the zoo’s annual weigh in: a health check for more than 400 species.

About 10,000 animals are being measured and weighed at the London Zoo's annual weigh-in. The records are shared with zoos and conservationists around the world.