Pterosaurs08


 * The wings of a Petrosaur are made up of tissue and skin.
 * It can range from the size of a sparrow to the size of an airplane.
 * Petrosaur means winged lizard
 * The pterosaurs ruled the skies in the Jurassic and Cretaceous, and included the largest vertebrate ever known to fly: the late Cretaceous  Quetzalcoatlus.