Even though touching the wings of a butterfly weakens it, it won't kill it and won't stop it from flying. Butterflies are tougher than we think.
Often, most people think that the "powder" on butterflies wings is vital. But this is not quite true. If you remove this "powder" the butterfly is weakened but can still fly.
The wings of the butterfly are covered with several layers of scales. These scales have no connection with the ability to fly.
But losing these scales make them defenceless. Indeed, the scales are colorful and are an optical illusion to predators. Patterns and colours also allow easier identification of butterflies between them.
Source: Futura- sciences
Photo credit : Flickr