Animal experts have concluded that an ape attack on a drone at Royal Burgers’ zoo in the Netherlands was ‘pre-planned’ and utilized a high level of ingenuity. The footage, shot in April, shows a group of chimpanzees observing the drone, gathering sticks and then climbing a scaffold to target it. A female ape called Tushi eventually downs the drone, and a group of apes then inspect it

•Learn more about the apes’ targeted attack on the drone