The zoo is carrying out it's annual check on over 750 species, recording weights and heights.

Dirk the Giant Galapagos Tortoise (Chelonoidis nigra) reacts as he is weighed by keeper Sebastian Grant on a giant set of weighing scales at London Zoo in London, Thursday, Aug. 25, 2011. The zoo is carrying out it's annual check on over 750 species, recording weights and heights. The information is recorded into the International Species Information System which can be shared with zoos across the world.









An Emperor Tamarin (Saguinus imperator) pokes his tongue out as he sits on a set of weighing scales at London Zoo in London, Thursday, Aug. 25, 2011. The zoo is carrying out it's annual check on over 750 species, recording weights and heights. The information is recorded into the International Species Information System which can be shared with zoos across the world.







Tammy the Tamandua, a tree-living anteater sits on a set of weighing scales at London Zoo in London, Thursday, Aug. 25, 2011. The zoo is carrying out it's annual check on over 750 species, recording weights and heights. The information is recorded into the International Species Information System which can be shared with zoos across the world.







LONDON, ENGLAND - AUGUST 25: Zookeeper Sebastian Grant (R) weighs Dirk, a giant Galapagos tortoise, at ZSL London Zoo as part of their annual weighing and measuring of their animals on August 25, 2011 in London, England. The heights and weights of over 750 different animal species at the zoo are recorded into the International Species Information System, to monitor their health and share the data with other zoos across the world.







LONDON, ENGLAND - AUGUST 25: A chameleon waits to be weighed and measured in the reptile house at ZSL London Zoo as part of their annual weighing and measuring of their animals on August 25, 2011 in London, England. The heights and weights of over 750 different animal species at the zoo are recorded into the International Species Information System, to monitor their health and share the data with other zoos across the world.







LONDON, ENGLAND - AUGUST 25: Zookeeper Jeff Lambert measures Jacqueline, a Mexican Red-Kneed Tarantula, at ZSL London Zoo as part of their annual weighing and measuring of their animals on August 25, 2011 in London, England. The heights and weights of over 750 different animal species at the zoo are recorded into the International Species Information System, to monitor their health and share the data with other zoos across the world.







A Tamandua stands on a weighing scale during a photocall to publicize the annual measurement of all the animals at London Zoo, in central London, August 25, 2011.







Zookeeper Mark Walpole holds a ruler against Jacqueline, a Mexican Red Kneed Tarantula, as he poses during a photocall to publicize the annual measurement of all the animas at London Zoo, in central London, August 25, 2011.







A Golden Lion Headed Tamarin waits to be given a treat by zookeeper Nicky Jago as it stands on a scale during a photocall to publicize the annual measurement of all the animals at London Zoo, in central London, August 25, 2011.







Zookeeper Sarah Dempsey holds a Pueblan Milk Snake as her colleague Glynn Hennessey prepares to measure it as they pose during a photocall to publicize London Zoo's annual measurement of all it's animals, in central London, August 25, 2011.







Dirk the giant Galapagos tortoise is distracted with a ball by his keeper Sebastian Grant, as he stands on a scale to weigh him during a photocall to publicize the annual measuring of all the animals at London Zoo, in central London, August 25, 2011.

source: daylife

photo: AP photo, Reuters