Reptiles
Turtles, tuatara, lizards and snakes, and crocodiles make up the major groups of living reptiles today, and they collectively account for over 8,700 species. Plesiosaurs, pliosaurs, ichthyosaurs, and dinosaurs are part of the diverse group of now-extinct reptiles that were once found on Earth but that we are now unlikely to encounter.
Reptiles Encyclopedia Articles
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chameleon
Chameleon, (family Chamaeleonidae), any of a group of primarily arboreal (tree-dwelling) Old World lizards best known for their ability to change body colour. Other characteristics of chameleons include...
snake
Snake, (suborder Serpentes), any of more than 3,400 species of reptiles distinguished by their limbless condition and greatly elongated body and tail. Classified with lizards in the order Squamata, snakes...
Gila monster
Gila monster, (Heloderma suspectum), one of two species of North American venomous lizards in the genus Heloderma of the family Helodermatidae. The Gila monster (H. suspectum) was named for the Gila River...
lizard
Lizard, (suborder Sauria), any of more than 5,500 species of reptiles belonging in the order Squamata (which also includes snakes, suborder Serpentes). Lizards are scaly-skinned reptiles that are usually...
sea turtle
Sea turtle, any of seven species of marine turtles belonging to the families Dermochelyidae (leatherback sea turtles) and Cheloniidae (green turtles, flatback sea turtles, loggerhead sea turtles, hawksbills,...
king cobra
King cobra, (Ophiophagus hannah), the world’s largest venomous snake, found predominantly in forests from India through Southeast Asia to the Philippines and Indonesia. The snake’s maximum confirmed length...
crocodile
Crocodile, (order Crocodylia, or Crocodilia), any of about 27 species of generally large, ponderous, amphibious animals of lizard-like appearance and carnivorous habit belonging to the reptile order Crocodylia....
tuatara
Tuatara, (genus Sphenodon), any of two species of moderately large lizardlike reptiles endemic to New Zealand. Although a growing number of geneticists contend that all living tuatara belong to the same...
iguana
Iguana, any of eight genera and roughly 30 species of the larger members of the lizard family Iguanidae. The name iguana usually refers only to the members of the subfamily Iguaninae. The best-known species...
python
Python, any of about 40 species of snakes, all but one of which are found in the Old World tropics and subtropics. Most are large, with the reticulated python (Malayopython reticulatus) of Asia being the...
turtle
Turtle, (order Testudines), any reptile with a body encased in a bony shell, including tortoises. Although numerous animals, from invertebrates to mammals, have evolved shells, none has an architecture...
alligator
Alligator, (genus Alligator), either of two crocodilians related to the tropical American caimans (family Alligatoridae). Alligators, like other crocodilians, are large animals with powerful tails that...