The evolution of birds began in the jurassic period with the earliest birds derived from a clade of theropoda dinosaurs named paraves birds are categorized as a biological class aves for more than a century the small theropod dinosaur archaeopteryx lithographica from the late jurassic period was considered to have been the earliest bird. A history of british birds is a natural history book by thomas bewick published in two volumes volume 1 land birds appeared in 1797 volume 2 water birds appeared in 1804 a supplement was published in 1821. Birds history breadcrumb our science research collections animals birds history more in birds side navigation our science research collections animals amphibians and reptiles d g elliott was the curator in residence who held responsibility for the bird collection initially elliott was head of the department of . The evolutionary history of birds experienced a new beginning when the main predators and competitors of birds dinosaurs and pterosaurs flying reptiles went extinct leaving the skies wide open today birds are a major source of food for carnivorous or omnivorous mammals like felines and humans. The origin of birds the discovery that birds evolved from small carnivorous dinosaurs of the late jurassic was made possible by recently discovered fossils from china south america and other countries as well as by looking at old museum specimens from new perspectives and with new methods
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