[London, January 8. Images via Getty]

LONDON, ENGLAND - JANUARY 08: A group of Oriental small-clawed otters line up on a rock at the ZSL London Zoo during the zoo's annual stocktake on January 8, 2009 in London, England. ZSL London Zoo is home to over 650 different species which all need to be cataloged in their annual stocktake which is a compulsory requirement for their zoo license. (Photo by Oli Scarff/Getty Images)

LONDON, ENGLAND - JANUARY 08: Zoo keeper Tony Dobbs makes a record of the number of meerkats in their enclosure at London Zoo as part of the zoo's annual stocktake on January 8, 2009 in London, England. ZSL London Zoo is home to over 650 different species which all need to be cataloged in their annual stocktake which is a compulsory requirement for their zoo license. (Photo by Oli Scarff/Getty Images)

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