Caption:
Greek tortoise c, Testudo graeca (vulnerable), hawksbill sea turtle b, Eretmochelys imbricata (critically endangered), green sea turtle a, Chelonia mydas (endangered) and European pond turtle d, Emys orbicularis. Chromolithograph from Gotthilf Heinrich von Schubert's Natural History (Naturgeschichte), Schreiber, Munich, 1886.