Penguins monkeys and camels were amongst the first in line as ZSL London Zoo began its annual stocktake.

       A zookeeper counts Humboldt penguins during the annual stocktake at ZSL London Zoo (Aaron Chown/PA)

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       Some of the penguins were curious about the stocktake (Aaron Chown/PA)

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       Let’s start again… The penguins made it more difficult by turning up all at once (Aaron Chown/PA)

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       Each year, zookeepers armed with clipboards and calculators tally up every creature at the zoo.

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       Squirrel monkeys were keen to help the count (Aaron Chown/PA)

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       The monkeys show their maths skills (Aaron Chown/PA)

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       A squirrel monkey during the annual stocktake at ZSL London Zoo (Aaron Chown/PA)

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       Asiatic lions were among those being tallied up by keepers at the zoo.

       Asiatic lions at ZSL London Zoo (Aaron Chown/PA)

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       The annual stocktake caught the attention of the Asiatic lions (Aaron Chown/PA)

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       Some of the lions thought it was play time not the annual stocktake (Aaron Chown/PA)

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       The audit takes keepers almost a week to complete and the information is shared with other zoos around the world.

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       The camels arrived in pairs (Aaron Chown/PA)

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       Keeper Mick Tiley with bactrian camels during the annual stocktake (Aaron Chown/PA)

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