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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

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.

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

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.

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

Jungle Nymph
A Jungle Nymph stays still long enough for zookeepers to get his weight.Leon Neal / Today
royal python
A royal python starts to slither off of the scale while being weighed.Bethany Clarke / Today


Tammy, a Tree anteater, is weighed during the London Zoo's annual weigh-in in London on August 21, 2013. The task involves weighing and measuring the ...
Tammy, a tree anteater, is fed by a zookeeper from a jar to keep him from wandering off.LEON NEAL / Today


Bactrian camel
Noemie, a Bactrian camel, is fed while being weighed.Leon Neal / Today


waxy monkey tree frog
A waxy monkey tree frog is weighed in a special frog measuring device.Suzanne Plunkett / Today


Tawny Owl
Owlberta, a Tawny owl, stays on its perch.Leon Neal / Today


African Land Snail
An African land snail eats lettuce while being weighed.Leon Neal / Today


Sumatran tiger
Jae Jae, a Sumatran tiger, is teased from above to get his height.Leon Neal / Today
Animal Tracks: Aug. 14 - 21

Slideshow  19 photos

Animal Tracks: Aug. 14 - 21

From a colorful hummingbird to a zoo weigh-in, get your cuteness fix with irresistible photos of creatures great and small.