Birds are descendants of a particular branch of dinosaurs known as Theropods. Some dinosaurs that are included in the Theropod s are the Tyrannosaurus rex, Giganotosaurus carolinii, Mononykus olecranus, and the Deinonychus (“Theropod Dinosaurs”). The article “Theropod Dinosaurs” says that, “recent studies have conclusively shown that birds are actually the descendants of small nonflying Theropods”. The specific sect of Theropod dinosaurs that scientists believe birds come from is known as Maniraptora ("Maniraptora (Seizing Hands)").
One of the factions of the group Maniraptora are known as Dromaeosaurs in the realm of science, but more colloquially known as “raptors.” Dromaeosaurs include the infamous Velociraptor. Velociraptor were 6 feet long, feathered, and pretty small coming in at about 100 pounds unlike the Velociraptors in the movie “Jurassic Park,” which were massive and did not feathers ("The Dromaeosauridae”).
The Theropod dinosaur group contains 3 main sub groups. These groups are Herrerasauridae, Ceratosauria, and Tetanurae. The Herrerasauridae have some Theropod
features, but do not have others, and even lack some features of dinosaurs. Some paleontologists believe that Her...
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...to move the head separate from the body was a characteristic of Archosaurs. Although today alligators and crocodiles have birds on the menu, both are descended from the same group of creatures (Powell).
Although birds and dinosaurs look drastically different, they are related through evolution. They come from a specific group of dinosaurs called Theropods and specifically a subgroup of Theropods known as Maniraptora ("Are Birds Really Dinosaurs?"). Dinosaurs and birds also share many features in common such as feathers, hollow bones, and the laying of eggs to give birth. Modern reptiles such as alligators are also related to birds far in the past (Powell). Finally, scientists draw their conclusions about the relation of dinosaurs and birds from modern birds and the similarities that are shown between them and dinosaurs from fossils ("Are Birds Really Dinosaurs?").
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