Damn things swarmed the camp I went to a few years ago, got into everything, all the tents, all the cabins, all the food, everything. It had rained the night before so a bunch even managed to dig themselves face first into the mud, leaving only their glowing backsides facing up as a final fudge you to the whole camp. The only good part was watching one of the locals cats trying to be a good neighbor and eat them all. After a while he started burping and one or two actually flew out of his mouth still alive.