Herpetology is concerned with "cold-blooded" groups of animals. "Herps" include salamanders, frogs, toads, an odd group of amphibians called caecilians , snakes , lizards , turtles , tuataras and crocodilians . Association of Reptile and Amphibian Veterinarians http://www.arav.org/ Reptile, Amphibian Medicine & Veterinary Books http://herpetology.com/medbooks.html Herp Clubs http://www.kingsnake.com/society.html Herp Care Sheets