Keepers record the number of penguins during ZSL London Zoo's annual stocktake of animals on January 2, 2014 in London, England. The zoo's annual stocktake requires keepers to check on the numbers of every one of the 800 different animals species held, including every invertebrate, bird, fish, mammal, reptile, and amphibian. (Photo by Oli Scarff/Getty Images)
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