Keepers faced the challenging task of tallying up every mamal , bird ,reptile ,fish and invertebrate at the Zoo - counting everything from a colony of inquisitive Humboldt penguins to Critically Endangered Asiatic lions and Bactrian camels .

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Size: 3228px × 4336px
Photo credit: © Charlie J Ercilla / Alamy / Afripics
License: Licensed
Model Released: No

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