Turtles of the World: A Guide to Every FamilyTurtles of the World reveals the extraordinary diversity of these amazing reptiles. Characterised by the bony shell that acts as a shield to protect the softer body within, turtles are survivors from the time of the dinosaurs and are even more ancient in evolutionary terms than snakes and crocodilians. Of more than 350 species known today, some are highly endangered. In this beautiful guide, turtle families, subfamilies, and genera are illustrated