How can? We know it's butterflies have wing of the most colorful and flashy! Well, the butterfly wings are actually formed from layers of chitin, a protein that forms the exoskeleton of insects. These layers so thin you can see to pass through. Thousands of tiny scales envelop this transparent chitin and scales it reflects light in different colours. Along with the increased age of butterflies, he will bring up the point where the transparent layer of chitin-his will be exposed. So the more old butterflies, their wings will be makin it appears transparent.