London, United Kingdom. 24th August 2017. With more than 20,000 animals in their care, ZSL London Zoo’s keepers spend hours throughout the year recording the heights and weights of all the animals, information which helps them to monitor their health and well-being. Credit: Peter Manning/Alamy Live News


United Kingdom. 24th August 2017. With more than 20,000 animals in their care, ZSL London Zoo’s keepers spend hours throughout the year recording the heights and weights of all the animals, information which helps them to monitor their health and well-being. The annual weigh-in is an opportunity for keepers at ZSL London Zoo to make sure the information they’ve recorded is up-to-date and accurate - each measurement is then added to the Zoological Information Management System (ZIMS), a database shared with zoos all over the world that helps zookeepers to compare important information on thousands of endangered species. PICTURED: Gorilla's sits next to a large ruler. Credit: Peter Manning / Alamy Live News


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