@Eris Back when we were kids, my brother managed to squish a fly in a way where it remained stuck on the wall. We left it there as a warning sign for other flying pests. We had a very quiet summer that year.
@alyx@Eris my granparent's old house had a wire net on the windows of the living room, at any time during the summer you would have at least 5 flies flying against it again and again, they made a lot of noise.