A collage of photos of this very unusual looking moth, showing it from behind, side, and front. It was on a thistle in the old field area. I was not sure at first if it was an insect or a bit of plant debris. But when I got a better look I realized it was a moth. I am pretty sure this is the Dark Marathyssa (Marathyssa inficita), whose host plant is staghorn sumac, of which we have much at the garden, and it was about 2 feet away from a big stand of sumac.