I had visions of whipped spider stitches on the wings of these little bats, but after experimenting a few times
this is the best I could do (left side). I'm not sure if it was the size of the wings (very small), or the curve, or just my lack of stitching ability, but it looks a little sloppy. So, I think I will opt for the easy way (right side) by using slanted satin stitches and Hot Wire couched.
If anyone thinks the whipped spider can be done, please let me know and I can include it in the stitch guide as an option. Meanwhile, time to get out the scissors.....