London Zoo weigh-in
Zoo keeper Jack Sargent measures Perry, a 6-foot llama, during the annual weight-in at London Zoo in London, England, Aug. 21, 2014. The height and mass of every animal in the zoo, of which there are over 16,000, is recorded and submitted to the Zoological Information Management System. This is combined with animal measurement data collected from over 800 zoos and aquariums in almost 80 countries, from which zoologists can compare information on thousands of endangered species.
Weighing the animals
Max, an eagle owl, is weighed at 1.9 kilograms during the annual weight-in at London Zoo, Aug. 21, 2014.
Weighing the animals
A 7-week-old Philippine crocodile is weighed at 79 grams during the annual weight-in at London Zoo, Aug. 21, 2014.
Weighing the animals
A zoo keeper measures a 'jungle nymph' during the annual weight-in at London Zoo.
Weighing the animals
Zoo keeper Angel Lawson, handles Cid, a red-ruffed lemur, who weighed in at 4.34 kilograms during the annual weight-in at London Zoo, Aug. 21, 2014.
Weighing the animals
Kumbuka, a Silverback Western Lowland Gorilla, is measured at 7 feet during the annual weight-in at London Zoo, Aug. 21, 2014.
Weighing the animals
Kumbuka, a Silverback Western Lowland Gorilla, pulls away the ruler after being measured as 7 feet tall during the annual weight-in at London Zoo, Aug. 21, 2014.
Weighing the animals
An African Land Snail is weighed at 480 kilograms during the annual weight-in at London Zoo on August 21, 2014.
Weighing the animals
A Partula snail weighting 1mg is held next to an African Land Snail weighing 480 kilograms during the annual weight-in at London Zoo, Aug. 21, 2014.
Weighing the animals
A 'mossy frog' is weighed at 37 grams during the annual weight-in at London Zoo, Aug. 21, 2014.
Weighing the animals
Photographers capture a 'mossy frog' being weighed during the annual weight-in at London Zoo, Aug. 21, 2014.