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Annual Stocktake at ZSL London Zoo
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London, UK - 2 January 2014: a penguin grabs a pen from the hands of a zookeeper during the annual animal stocktake at ZSL London Zoo. The compulsory count is required as part of ZSL London Zoo’s zoo license and the results are logged into the International Species Information System (ISIS), where the data is shared with zoos around the world and used to manage the international breeding programmes for endangered animals.