This is a beautiful sheet consisting of 16 stamps, issued in 2001, displaying a variety of flying reptiles. The animals shown include the Protaarchaeopteryx, Pterodactylus, Eudimorphodon, Rhamphorhynchus, Quetzalcoalthus, Cearadactylus, Dsungaripterus, Dimorphodon, Pterodaustro, Pteranodon, Scaphognthus, Kuehneosaurus, Sinosauropteryx, Sordes, Coelurosauravus, and the Anurognathus. The sheet is Post Office fresh, mint never hinged.