Staff at London Zoo readied their clipboards and calculators on Friday as they began to count more than 10,000 animals during the annual stocktake.The stocktake is a requirement of the zoo's annual licence and will take the zookeepers almost a week to complete.Among the animals to be counted are a colony of 65 Humboldt penguins and a troop of critically endangered western lowland gorillas.

Staff at London Zoo readied their clipboards and calculators on Friday as they began to count more than 10,000 animals during the annual stocktake.The stocktake is a requirement of the zoo's annual licence and will take the zookeepers almost a week to complete.Among the animals to be counted are a colony of 65 Humboldt penguins and a troop of critically endangered western lowland gorillas.