Buzz Off, Heat.

Hornets may chill out with a bit of electricity, say a group of biologists and physicists from Tel Aviv University. Infrared images of hornets anesthetized in their nest revealed that the cuticle around body parts such as the abdomen could be up to 3 degrees Celsius cooler than the nest material. But insect physiologist Allen Gibbs of the University of Arizona thinks that evaporative cooling could in fact do the trick and that the measurements may be misleading because of differences in air and nest temperature.