Animals line up for the London Zoo's annual weigh-in 

It's that time again — when animals (and insects) big and small are measured at the London Zoo. Wednesday begins the process of monitoring every animal, a process that takes all year. According to zoo officials, the keepers are responsible for recording the height and weight of more than 16,000 animals, including tigers, camels, frogs and much more. 

The measurements are then recorded and shared with zoos around the world. Zoologists use the information to compare statistics on thousands of endangered species.

Leon Neal / AFP - Getty Images
It's not easy being green: An African bullfrog is placed on a weighing scale.

Zoological director David Field says the information helps zoos monitor animals' health, diets and general well-being. 

"By sharing it with other zoos and conservationists, we can use this knowledge to protect wild animals, and use it to assess their health, their behaviors and even their ages,” Field said in a press release.

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Zoo animals climb on scales for annual weigh-in

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Zoo animals climb on scales for annual weigh-in

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Take a look at the wide range of animals and insects getting ready for their inspection:







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