In April 2015, a TV crew was filming at the Royal Burgers Zoo in the Netherlands. It was the intention to film chimps in the enclosure from close-by and from above with the means of an aerial drone. When the drone came a bit closer to the primates, a female chimpanzee named Tushi made two sweeps with a branch that she held in a hand; the second one was successful and downed the drone. Now, in a paper published in the journal Primates, two researchers...
