Japanese natural beekeeping：Bees vs Hornet: Japanese Honeybees Defeat a Yellow H

I found a ball of bees formed on the net I set up around the beehive of Japanese honeybees (Apis cerana japonica). Upon closer inspection, I discovered a Yellow hornet (Vespa simillima xanthoptera) inside. This Yellow hornet, which came to prey on the bees, was counterattacked and killed by them. The bees can increase the temperature inside this ball to kill the hornet with heat.