Instead of utilizing its stinger against the pack-hunting hornet, the honeybee instead waits for the predator, having earlier detected traces of its pheremonal hunting signals. As a hornet approaches the nest in an attempt to kill honeybees, a hundred or so will guard the nest entrance in an attempt to draw it on. When the hornet enters the nest, it is immediately mobbed by a clump of approximately 500 honeybees, which, surprisingly, do not sting the hornet to death as previously thought. Instead, the bees heat themselves up to 47 degrees C very quickly using their flight muscles. As the hornet窶冱 upper lethal temperature is 44-46 degrees C, it is killed quickly, effectively baked to death by the large clump of bees.