Media playback is unsupported on your device

London Zoo residents weigh in for annual audit

22 August 2012 Last updated at 14:16 BST

Zoo keepers at London Zoo face the daunting task of measuring and weighing all the animals for their annual audit.

The zoo is home to about 750 different species - with thousands of animals needing measuring and weighing.

It's a job that requires big scales, quite a long measuring tape, and a lot of nerve.

Siobhan Robbins reports.

Most watched

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.