Mark Auliya has no problem with snakes attacking other animals. Carnivores need to eat, after all. But last month, staring at a YouTube video in his home office in Bonn, Germany, the reptile expert threw his glasses down in disgust. “This is something really nasty,” he said. On Auliya’s screen, a Burmese python, a constrictor that normally kills birds and small mammals, was locked onto a gibbon. The panicked primate was fighting for its life as the snake, coiled around its torso, began squeezing.