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

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