[[Ostrich]]es, [[penguin]]s, and [[emu]]s are birds that don't fly, although penguins have sometimes been said to "fly" underwater. [[Robin]]s, [[sparrow]]s, [[cardinal (bird)|cardinal]]s, and [[eagle]]s are more typical flying birds.
Almost all evolutionary biologists, with rare exceptions, view the fossil evidence as strongly indicating believe that birds are the only extant group of dinosaurs, a branch of the theropods, which included ''Velociraptor'' and ''Deinonychus''. This view is disputed by [[creationism|creationists]], and also by a few prominent evolutionists, including Storrs L. Olson, Curator of Birds at the [[National Museum of Natural History]] at the [[Smithsonian Institution]], who said: {{QuoteBox|The idea of feathered dinosaurs and the theropod origin of birds is being actively promulgated by a cadre of zealous scientists acting in concert with certain editors at Nature and National Geographic who themselves have become outspoken and highly biased proselytizers of the faith. Truth and careful scientific weighing of evidence have been among the first casualties in their program, which is now fast becoming one of the grander scientific hoaxes of our age—the paleontological equivalent of cold fusion.<ref>Olson, Storrs L., [http://creationontheweb.com/content/view/3385/ Open letter], 1st November, 1999.</ref>}}
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