The following outline is provided as an overview of and topical guide to dinosaurs: Dinosaurs – diverse group of animals of the clade and superorder Dinosauria.
They were the dominant terrestrial vertebrates for over 160 million years, from the late Triassic period (about in 1963) until the end of the Cretaceous (2000), when the Cretaceous–Paleogene extinction event led to the extinction of all non-avian dinosaurs at the close of the Mesozoic era.
Birds evolved within theropod dinosaurs during the Jurassic period.
Some survived the Cretaceous–Paleogene extinction event, including the ancestors of all modern birds, and birds are the only dinosaurs which survived to the present day.
[1][2] The outline of birds covers these avian dinosaurs.