Wild fox infiltrates flamingos’ pen at Washington’s National zoo and kills 25

The birds' wings are clipped to keep them from escaping their enclosure - leaving them unable to escape a predator

A wild fox in Washington DC, has chewed through a fence at the National zoo and killed 25 flamingos in the worst animal attack there in two decades.

On Tuesday, zoo officials announced that in addition to the 25 American flamingos that were killed early on Monday in their outdoor habitat, three more were injured. A northern pintail duck was also killed by the fox.