ALL reptiles shed their skins... including Copperheads.

reptiles(mostly snakes)

Yes, all snakes shed their skins. They do this to grow. It enables them to be renewed, the new scales are brighter.

As snakes grow the skin doesn't grow with them, so they shed the skin because it no longer "fits" them. By shedding the skin they can get larger, and grow.

ALL snakes shed their skins - their skin doesn't 'stretch' like ours does, so they have to discard the old skin when it gets too tight.