Tom Nichols
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See text for extinct groups. Reptiles, as commonly defined, are a group of tetrapods with an ectothermic ('cold-blooded') metabolism and amniotic development. Living reptiles comprise four orders: Testudines ( turtles ), Crocodilia ( crocodilians ), Squamata ( lizards and snakes ), and Rhynchocephalia (the tuatara ).
Jun 12, 2024 · A reptile is any member of the class Reptilia, the group of air-breathing vertebrates that have internal fertilization, amniotic development, and epidermal scales covering part or all of their body. The major groups of living reptiles are turtles, tuatara, lizards, snakes, and crocodiles.
Mar 2, 2024 · Learn about the class Reptilia, which includes snakes, lizards, turtles, crocodilians, and tuataras. Discover their evolutionary history, physical traits, orders, and interesting facts.
Learn about reptiles, the air-breathing vertebrates covered in scales or bony plates. See photos and videos of crocodiles, snakes, lizards, turtles, and more.
May 17, 2022 · Learn about the diverse group of reptiles, their evolution, adaptations, and reproduction. Find out the differences between oviparous, viviparous, and asexual reptiles, and see photos of various species.
Learn about the class Reptilia, which includes snakes, lizards, crocodiles, turtles, and tuatara. Find out how reptiles are cold-blooded, scaly, and have internal fertilization, and see some examples of extinct and living reptiles.
Jun 12, 2024 · Learn about lizards, the diverse group of reptiles with legs, eyelids, and external ears. Find out how lizards vary in size, shape, habitat, diet, and behavior, and how some are related to snakes and mosasaurs.
