Native to tropical Asia, the orange oakleaf butterfly (Kallima inachus) is well named. Its underside looks exactly like a leaf when the butterfly closes its wings. It even has wet and dry season forms that correspond to those seasons’ leaves.
It’s amazingly beautiful when it opens its wings.
Watch it become a leaf as it flutters in place.
(photos from Wikimedia Commons; click on the captions to see the originals. video from Red Cache World on YouTube)