I saw that thread about the hornets stuffing the bees - I watched that vid on Natg sometime ago and it amazed me then.
Heres a URL to show what the small bees can do in defence if they get it right....
http://www.goratec.com/applications....19&language=de
Thought you might like to see a dead hornet for a change
"Giant hornet dies when the outside temperature exceeds 45°C. On the other hand, Japanese honeybees can survive up to 50°C. Japanese honeybee, an insect of cold-blooded animal, takes advantage of the difference of maximum fatal temperature between the two species and takes their defensive activity by changing their own body temperature.