The Order Squamata, scaled reptiles, is the largest order of reptiles with over 6,000 living species. It is composed of three suborders: the Amphisbaenia (amphisbaenians), the Lacertilia (lizards), and the Serpentes (snakes). Members of this huge order are found worldwide, except in Antarctica and on a few very remote islands. All members of this order share similar characters in bone structures and anatomy of the male sex organ. All also have bodies covered in scales, and all periodically shed their skin.