PICTURES

London Zoo conducts annual weigh-in for animals

Keeper Jeff Lambert holds a scale while he weighs a giant african land snail during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Keeper Jeff Lambert holds a scale while he weighs a giant african land snail during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Alberta, a tawny owl, perches on a scale during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Alberta, a tawny owl, perches on a scale during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Photographers take pictures of Max, an eurasian eagle-owl, as it perches on a scale next to keeper Helen Crooks during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -
Photographers take pictures of Max, an eurasian eagle-owl, as it perches on a scale next to keeper Helen Crooks during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Max, an eurasian eagle-owl, sits on a scale during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Z
Max, an eurasian eagle-owl, sits on a scale during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
Zookeepers weigh Noemie, a bactrian camel, during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zi
Zookeepers weigh Noemie, a bactrian camel, during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
Zookeepers weigh Noemie, a bactrian camel, during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Zookeepers weigh Noemie, a bactrian camel, during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
A royal python sits on a scale during the annual weigh-in at London Zoo, London on Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PH
A royal python sits on a scale during the annual weigh-in at London Zoo, London on Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
A zookeeper weighs Tammy, a tree anteater, during the annual weigh-in at London Zoo, London on Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (
A zookeeper weighs Tammy, a tree anteater, during the annual weigh-in at London Zoo, London on Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
Keeper Marcel McKinley uses worms to entice Tammy, a tree anteater, to stay on a scale during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Keeper Marcel McKinley uses worms to entice Tammy, a tree anteater, to stay on a scale during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Keeper Paul Kybett dangles a piece of meat to entice Jae Jae, a sumatran tiger, to jump up next to a height chart during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013.
Keeper Paul Kybett dangles a piece of meat to entice Jae Jae, a sumatran tiger, to jump up next to a height chart during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Jae Jae, a sumatran tiger, licks its lips as it approaches a height chart during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Jae Jae, a sumatran tiger, licks its lips as it approaches a height chart during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Keeper Jeff Lambert measures the length of a jungle nymph stick insect during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Keeper Jeff Lambert measures the length of a jungle nymph stick insect during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Keeper Jeff Lambert holds a scale while he weighs a jungle nymph stick insect during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
Keeper Jeff Lambert holds a scale while he weighs a jungle nymph stick insect during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
A zookeeper weighs a giant stick insect during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims)
A zookeeper weighs a giant stick insect during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
A giant african bull frog sits on a scale during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zim
A giant african bull frog sits on a scale during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
A zookeeper places a giant african bull frog on a scale during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Manageme
A zookeeper places a giant african bull frog on a scale during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
An african bullfrog is weighed on a scale during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
An african bullfrog is weighed on a scale during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
A zookeeper weighs a waxy monkey frog during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims).
A zookeeper weighs a waxy monkey frog during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
A zookeeper weighs a waxy monkey frog during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims).
A zookeeper weighs a waxy monkey frog during the annual weigh-in at London Zoo, London, Wednesday, Aug 21, 2013, where creatures are weighed and measured for their measurements to be recorded into the Zoological Information Management System (Zims). -- PHOTO: AP
A waxy monkey tree frog is weighed in a measuring device during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
A waxy monkey tree frog is weighed in a measuring device during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
A waxy monkey tree frog is weighed in a measuring device during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS
A waxy monkey tree frog is weighed in a measuring device during a photocall to publicise the annual measuring of all the animals at the London Zoo, in central London on Wednesday, Aug 21, 2013. -- PHOTO: REUTERS

Ever wondered how a tiger's height is measured? Zookeepers at the London Zoo had to dangle a piece of meat to entice Jae Jae, a sumatran tiger, to jump up next to a height chart.

The zoo conducted its annual weigh-in and measuring of its animals on Wednesday.

There were creatures more docile than Jae Jae, of course. Frogs and owls were just some of the animals which were measured using a variety of instruments. Have a look at how it happened in the picture gallery above.