Fly on curled Aster petals

Not sure if this is a Fly or a Hover Fly. Whatever it is, it's very spikey! It wasn't until I got home early this afternoon, after going on half of a bird walk followed by a couple of hours of the semi-annual Weaselhead Clean-up, that I discovered something. When I cropped and enlarged this photo, I saw that this Aster has those beautiful coiled petals like another photo I uploaded a few days ago. How clever that nature has designed these Asters to coil so carefully. I wonder if any other flowers do the same thing when they begin to die.