are dinosaurs lizards or birds?
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Dinosaurs are reptiles. Specifically, dinosaurs belong to a group of reptiles called “Archosaurs,” which includes reptiles such as dinosaurs, pterosaurs (things like pterodactyls, which are not dinosaurs), and crurotarsans (which used to be a big, diverse group, but only the crocodilians survived to today).
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Snakes, lizards, turtles, crocodilians, and birds are reptiles. Like all vertebrates, reptiles have bony skeletons that support their bodies. ... So, why are birds considered reptiles? Birds look very different from other reptiles, they have feathers, fly, sing complex songs, and have many other unique features.
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They first evolved from theropod dinosaurs over 150 million years ago in what is now China. But the word avian has more of a role in taxonomy than anything else. Birds are classified taxonomically first belonging to the the class of vertebrates that are birds.
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Biology and behaviour. Crocodilians are more closely related to birds and dinosaurs than to most animals classified as reptiles, the three families being included in the group Archosauria ('ruling reptiles'). Despite their prehistoric look, crocodiles are among the more biologically complex reptiles.
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Other than birds, however, there is no scientific evidence that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive. These, and all other non-avian dinosaurs became extinct at least 65 million years ago at the end of the Cretaceous Period.
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Dinosaurs and Crocodilians are both descended from the common ancestor of all archosaurs (as are pterosaurs), but the lineages diverged soon after. So crocodiles have been called “dinosaur uncles” (relatives of dinosaur ancestors), but not dinosaurs themselves.
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['Reptiles belong to the Class: Reptilia while birds belong to the Class: Aves.', 'Reptiles have scales all over the body, whereas birds have scales on the legs and the rest of the skin is covered with fluffy feathers.', 'All the present-day reptiles are carnivore, but birds have many different types of food habits.']
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A. Birds share many characteristics with reptiles such as being vertebrates, having scales on parts of their bodies, and laying amniotic eggs with shells. B. Birds have unique characteristics such as laying eggs with hard shells, and having feathers, wings, and a beak.
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Alligators and birds are part of the same larger group, called archosaurs, which has existed for 250 million years and which has given rise not only to birds and crocodilians, but also to dinosaurs.
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Dinosaurs are a group of reptiles that dominated the land for over 140 million years (more than 160 million years in some parts of the world). They evolved diverse shapes and sizes, from the fearsome giant Spinosaurus to the chicken-sized Microraptor, and were able to survive in a variety of ecosystems.
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Reptile. Specifically, T. rex was a diapsid reptile in the archosaur family. It's closest living relatives are the birds and the crocodilians.
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is that lizard is any reptile of the order squamata, usually having four legs, external ear openings, movable eyelids and a long slender body and tail while skink is a lizard of the scincidae family, having small or reduced limbs or none at all and long tails that are regenerated when shed or skink can be (obsolete) ...
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['Carnotaurus.', 'Death Worm.', 'Fire Wyvern.', 'Leedsichthys.', 'Megalodon.', 'Mosasaurus.', 'Raptor.', 'Tusoteuthis.']
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Pterodactyl, Pteranodon & Other Flying 'Dinosaurs' Pterodactyl is the common term for the winged reptiles properly called pterosaurs, which belong to the taxonomic order Pterosauria. Scientists typically avoid using the term and concentrate on individual genera, such as Pterodactylus and Pteranodon.
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In fact, birds are commonly thought to be the only animals around today that are direct descendants of dinosaurs. So next time you visit a farm, remember, all those squawking chickens are actually the closest living relative of the most incredible predator the world has ever known!
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Many prehistoric animal groups are popularly conceived of as dinosaurs, such as ichthyosaurs, mosasaurs, plesiosaurs, pterosaurs, and pelycosaurs (especially Dimetrodon), but are not classified scientifically as dinosaurs, and none had the erect hind limb posture characteristic of true dinosaurs.
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Just as you thought, the quick answer is yes, dinosaurs are reptiles. ... After all, dinosaurs lived in the Mesozoic Era – the 'Age of Reptiles', they had scaly skin, they hatched from eggs, and even the word 'dinosaur' means 'terrible lizard' (lizards being a kind of reptile).