I caught a really interesting show on TV (National Geographic Channel maybe) about these giant hornets in Japan. They showed the danger that these hornets could be to European bees... One hornet finds the bee colony and marks it, then 30 hornets return to the colony and can wipe out a bee colony of 30,000!!! Now that's some devestation! What was really cool though was the Japanese bees' defense against the hornets. When the scout hornet arrives at the hive, they lure him inside, then all at once, the bees swarm the scout hornet. They begin vibrating their bodies and raise their body temperatures to 117 degrees. What's amazing is that the bees will begin to die at 118 degrees, but the hornet will fry at 115 degrees. So the bees roast the hornet to death before he can return to the hornet colony to report the location of the bee hive. It was a pretty cool program.