That's nothin'. Here in Florida we are in the midst of our annual springtime outbreak of "lovebugs" and it's the worst I've seen in 27 years of living here. Lovebugs, as the name implies, basically do nothing but fly around fornicating in the same position as these flies. Their bodies are similar in size and make-up to fireflies, what we used to call lightning bugs in the midwestern US. This year they are swarming in the billions everywhere here and they make a hell of a mess out of the front of a car in a very short time. I've posted a pic of the front of my old Ford a few images down the line. and that carnage basically represents what can be done in about a quarter mile. Fortunately they don't bite but they're getting into everything and ruining the paint on peoples' cars.