by Armand Jacobs

Here is a video (in japanese unfortunately but still very impressive) of the collective defense mechanisms used by the Japanese honeybees against the Asian giant hornet (Suzumebachi).

As soon as the scout hornet enters the hive and releases its pheromones, the Japanese honeybees form a big and compact ball around the hornet and use their warming muscles to literally cook the hornet...

Even more interesting is the fact that European bees that were introduced in Japan for their better honey production are defenseless against this hornet that can kill up to 40 bees per minute!

http://www.youtube.com/watch?v=LLWZHg_TjA0