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Squirrel monkeys stand during the annual stocktake at London Zoo in London, Britain, Jan. 3, 2025. (Xinhua)

A keeper counts penguin during the annual stocktake at London Zoo in London, Britain, Jan. 3, 2025. (Xinhua)

A keeper counts penguin during the annual stocktake at London Zoo in London, Britain, Jan. 3, 2025. (Xinhua)

A keeper counts squirrel monkeys during the annual stocktake at London Zoo in London, Britain, Jan. 3, 2025. (Xinhua)

A keeper counts brown-nosed coatis during the annual stocktake at London Zoo in London, Britain, Jan. 3, 2025. (Xinhua)