turtles are capable of living for at least 50 years. References Further reading Agassiz L (1857). Contributions to the Natural History of the United States of America. Vol. I. Boston: Little, Brown and Company. li + 452 pp. (Cistudo triunguis, new species, p. 445). External links Center for Reptile and Amphibian Conservation and Management Missouri's Turtles Three-toed box turtle Diet and Feeding Your Box Turtle Terrapene