Mossy leaf-tailed gecko
It may look like this lizard has been overrun with moss, but save your sympathy — that's its skin. This is the mossy leaf-tailed gecko, a master of disguise found only in the forests of Madagascar.
Since these geckos live in trees, they've evolved moss- and bark-colored skin, complete with "dermal flaps" that break up their outline (see this photo for an example). But they also have another trick up their sleeves: Much like chameleons, they can change their skin color to match the background.