Crested geckos Rhacodactylus ciliatus are easily identified by a triangular-shaped head, huge eyes and a soft, spiky fringe extending over the eyes and down the back. Their skin is very silky to the touch, as it is covered with very fine scales. It feels like suede and is very tough, providing the gecko with protection. They shed regularly, eating the outgrown skin as they remove it from their body. Crested geckos can darken their colour for camouflage. This gecko has no eyelids, only a transparent membrane that serves as a protective cover. They use their tongue to clean and moisten their eyes. They are able to climb smooth, vertical surfaces with the use of their toe pads. Crested Geckos cannot grow their tail back once it has dropped. They were thought to be extinct until they were rediscovered in 1994.