Originally Posted by PaperPrincess
I think I would outline the butterfly bodies, then do curved butterfly butterfly wings over the square blocks. Just the outline of butterfly wings.
Ditto, an easy curve over the square blocks to reinforce the wings.
In the sashing, you could make your echo stitching with a slight wave instead of straight lines, that would tie in the curves together and is actually easier than the straight lines to quilt (you don't need to worry if you "wander" slightly).