Chameleons are famous for their ability to blend into any background, making them virtually disappear. It's a pretty amazing adaptation to see in nature, especially when you realize that you're really not supposed to see it. A chameleon's changing camouflage is one of the natural phenomena that's closest to magic.
And to think, there's a variety of chameleon out there that has another adaptation that has helped it avoid detection: it's super tiny, perhaps even the smallest reptile in the world.