So here we have a newly hatched Butterfly!!
If I had put the yellow fabric to the inside then the confusion would be showing more when the butterfly was open. It is entirely up to you.
One note - I have tried various types of bodies such as a cone shaped piece of fabric rolled into a long cone and it is harder to do. So this whipstitch is the easiest way I have found to do the body.
Attach a piece of magnet to the back side of the butterfly for a magnet.