This "hot defensive bee ball" behavior has been observed previously, but there are two interesting developments that are hot off the presses of the jounal PLos ONE today. Firstly, there's the video below of the honeybees swarming an Asian giant hornet, which is pretty cool. Secondly, in studying the Japanese honeybees the researchers have detected a previously undiscovered kind of neural activity that takes place when the bees engage in "hot defensive bee balling." It's a kind of neural activity that isn't seen in European honeybees, taking place in the higher brain center. We're not sure exactly what that means yet, but if you're a Asian giant hornet, take note.