I wasn't out looking for mating Dance Flies, but I kept seeing small, dark, balls... flying slowly through the woods in this cut on an old iron ore trail. What an interesting place! It's a wonder I even noticed the tiny UFOs.
Eventually, I followed one of those unusual flying objects until it landed. The slow-flying object turned out to be a pair of mating Dance Flies carrying a nupital gift.
I managed to snap a few pictures of the Dance Flies. This first photo is the most discrete one.