Crocodilians
American Alligator (Alligator mississippiensis), Bibliography of Crocodilian Biology, Crocodile Library, Crocodile Specialist Group, Crocodilia, Crocodilian Species List, Crocodilians: Natural History and Conservation, Crocodylidae, Gharial, Lord of the Nile
Tuataras
New Zealand's Tuatara, Sphenodon punctatus (Tuatara), Tuatara, Tuatara, Tuatara, Tuatara Facts, Tuatara: Reptile With a Third Eye
Turtles
Sea Turtles, African Hingeback Tortoise Central, African Mud Turtles, American Box Turtles, Ashton Biodiversity Research and Preservation Inst, Asian Turtle Crisis, Bermuda Turtle Project, Big-headed Turtle, Box Turtle Conservation Strategies, McKeever Cente, Box Turtle Observation Project, California Turtle and Tortoise Club
Class Reptilia
Outline of the taxonomy of turtles, snakes and lizards, alligators and crocodiles, with information on selected subgroups and species.
Discover Canada's Aquatic Reptiles
All about Canada's snakes, lizards, and turtles.
EMBL Reptile Database
An information resource on reptile taxonomy with a focus on the species level.
Reptile Image Gallery
Small images of snakes, crocodilians, and lizards by Adrian Warren.
Reptiles in Hiroshima
Information and photos of the 4 species of turtles, 4 lizards, and 8 snakes in Hiroshima Prefecture, Japan.
Reptiles of Panama
Full checklist, with images and information for many species.
Reptiles of Tasmania
An outstanding guide to Tasmania's reptiles, from the Tasmanian Parks and Wildlife Service.
Sean Thomas' Snake and Herpetological Informa
Photos and information about snakes in South Africa.
Snakes and Other Reptiles
World Book Encyclopedia's feature on reptiles.
Tom Spinker's Reptile Photos from the Field
Personal collection of snake and lizard photographs taken in south Florida, Oaxaca, and elsewhere.
Turtle, Tuatara, Crocodile Checklist
Checklist of crocodilians, tuatara, and turtles of the world: A web version of the long out-of-print edition originally published by the Association of Systematics Collections in 1989.