In 2016, the number of dinosaurs that existed in the Mesozoic was estimated to be between 1,543 and 2,468. Some are herbivores, others eat meat, including nuts, fish, insects, and omnivores. Dinosaurs are bipedal species from ancestors (as are all modern birds), some prehistoric four-legged species, and others, such as the Anchisaurus and Iguanodon, can easily walk with either or both. four legs. Variation traits in skull bones such as horns and ruffles are common, and some extinct species include skeleton armor.
Despite being famous for their giant body size, many dinosaurs are human or smaller, and modern birds are usually modest in size. Today’s dinosaurs live on all continents and fossil records show that they achieved global distribution at least in the early Jurassic period. Modern birds live in most of the environments present, from terrestrial to marine, and there is plenty of evidence that some non-bird dinosaurs (like the Microraptor) can fly or at least surf. , and others, such as a sp Dinosaurid, have a semi-aquatic habit.
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