In response to a question, I referred to this section of image, writing as follows.
Something about this description bothered me. The feeling got stronger when I tried to take some closer shots of this area and found that the loose scales were no longer there.Then at the bottom of the picture, in the blown-up background, you can see a half dozen very sharp prongs, pointing down in the picture. Those are actually loose scales, from somewhere on the body I think, that got caught up in the wing scales and didn't come loose when I dusted the critter with CO2. I didn't notice them until I had already shot the stacks, and then I decided they were so interesting that I'd highlight them in the montage.
Hhmm, I guess they must have come completely detached and blown away.
Or did they?
I went back to my original stack of images and viewed it in "filmstrip" mode.
A rather different picture emerged.
I'm still laughing about this. Those apparently four loose scales are in fact one loose scale -- barely stuck down at its base, and waving around madly in the gentlest of air currents over my table. There were only 4 out of 100 frames in the whole stack where the loose scale was sharply focused, and Helicon Focus dutifully preserved every one of them!
I think I'll leave the image the way it is. This'll make a nice conversation piece!