>>2641388They swarm. They are highly aggressive bee sized wasps and their stings deposit pheromones that cause others to sting you. I've been swarmed a few times in the mountains. They were completely covering this poor toad stinging it to death. There were so many on it that I couldn't make them out at first because it looked like his skin was moving until I realized it wasn't skin, it was yellow jackets. Another time I was climbing a hill side and put my hand right into a nest trying to get a grip. Fuckers turned my thumb into a hot dog.