Animals take part in annual weigh-in at London Zoo

A waxy monkey tree frog is weighed in a measuring device
A waxy monkey tree frog is weighed in a measuring device Photo: REUTERS/Suzanne Plunkett

Waxy monkey frogs, giant African land snails and a tawny owl were among the animals participating in London Zoo's annual weigh-in.

The measurements are used to monitor the animals' health and are shared with zoos across the world to compare information on endangered species.

Alberta, a Tawny Owl, perches on a scale
Alberta, a Tawny Owl, perches on a scale Credit: REUTERS/Suzanne Plunkett

Alberta the owl appeared cooperative atop the electric scales, but other creatures present more of a challenge. Zookeeper Angela Ryan, who looks after the camels, said:

Not everything can be weighed, but anything that we have that can be trained, from camels to birds, aardvarks to armadillos - even the tigers - we are trying to get weighed today.

Jae Jae, the Sumatran Tiger is measured
Jae Jae the Sumatran Tiger is measured Credit: Suzan/Suzan/EMPICS Entertainment

Zookeepers used strips of horse meat on a long stick to tempt Jae Jae the Sumatran tiger to stand up against a measuring tape. He was found to have a standing height of 2 metres (6ft 6in).

Using meat to tempt Jae Jae to stand up
Using meat to tempt Jae Jae to stand up Credit: Suzan/Suzan/EMPICS Entertainment

"Really, species to species doesn't matter, it's the individual to individual that's important," zookeeper Paul Kybett said.

Read: Fundraisers run naked in London Zoo tigers streak

Tammy, the Tree Anteater is weighed
Tammy the Tree Anteater is weighed Credit: Suzan/Suzan/EMPICS Entertainment
Noemie, the Camel, stands on a set of electronic scales
Noemie the Camel stands on a set of electronic scales Credit: Suzan/Suzan/EMPICS Entertainment