Reptiles of the order Testudines, turtles live both on land and at sea. These slow-moving reptiles are amazing survivors whose ancestors date back more than two hundred million years. No doubt their staying power is due in large part to their bony hard shell, which protects vital organs and a retractable head. This fascinating calendar surveys a diverse collection of turtles from all around the world. BrownTrout is committed to sustainability.