This is a very small example. Right now, moths don't really need to change into something that isn't a moth. For the most part, they are camouflaged to fit whatever kind of plant they eat, they fly about the place and they lay eggs, which is no different to the challenges they have been facing for a very long time. Creatures that are classified as moths (Six legs, small, slightly furry body, has 2 wings that lie flat when the creature is not in flight) are not counted as different kinds of animal due to their colours. All creatures that are six-legged, small, slightly furry and have wings that lie flat when the creature is not flying are considered moths.