All of them. At least that’s how I feel after watching 30 seconds of this video.
After cooling off, I wikipediaed. It appears the hornets only live in Japan and are not invading Europe or America. In Japan, they are considered useful because they kill crop pests. They can fly up to 40 miles an hour. They’re considered a delicacy fried. Also, they can only kill European honeybees.
Here, in the awesomest nature description I have heard in a long time, is how Japanese honeybees defend themselves against the hornets:
“When a hornet approaches the hive to release pheromones, the bee workers emerge from their hive in an angry cloud-formation with some 500 individuals. As they form a tight ball around the hornet, the ball increases in heat to 47 °C (117 °F) from their vibrating wings, forming a convection oven as the heat released by the bees’ bodies is spread over the hornets. Because bees can survive higher temperatures (48 to 50 °C (118 to 122 °F)) than the hornet (44 to 46 °C (111 to 115 °F)), the latter dies.”
Take THAT.