10 adorable photos from London Zoo's annual weigh-in show curious monkeys, penguins, and meerkats stepping on the scale
London Zoo weighs and measures every single one of its animals each year.
Zookeepers use the data to monitor animals' health and well-being.
Penguins, meerkats, monkeys, tigers, and tarantulas had their turns on the scale.
Every year, animals at London Zoo step on the scale for their annual weigh-in — and, with 14,000 animals to measure, it's a task that takes zookeepers several days.
They use the information to monitor the animals' health and well-being, entering their findings into a database shared with zoos worldwide to compare and track data about endangered species, according to the zoo's official website.
Here are 10 adorable photos from this year's weigh-in from August 24.
At the London Zoo's annual weigh-in on August 24, Humboldt penguins lined up at the scale.
Some penguins had to be picked up and placed in the right spot by a zookeeper.
A Sumatran tiger tried to climb the large ruler in its enclosure.
Frank the meerkat had his turn on the scale.
He appeared interested in checking the zookeeper's work.
An Asian small-clawed otter yawned while being measured.
A Western Lowland gorilla examined the ruler from a tree perch.
A zookeeper rewarded a squirrel monkey with treats for participating in the weigh-in.
Every animal at the zoo, no matter how small, gets a turn. A Mexican redknee tarantula was weighed in a glass bowl placed on a scale.
A stick insect blended right in with the zookeeper's wooden ruler.