Origin of birds
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The scientific question of which larger group of animals birds evolved within has traditionally been called the "origin of birds". The present scientific consensus is that birds are a group of manirap
The Berlin specimen of Archaeopteryx lithographica
Thomas Henry Huxley (1825–1895)
Heilmann's hypothetical illustration of a pair of fighting 'Proaves' from 1916
Fossil of Sinosauropteryx prima
Evolution of birds
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The evolution of birds began in the Jurassic Period, with the earliest birds derived from a clade of theropod dinosaurs named Paraves. Birds are categorized as a biological class, Aves. For more than
Origin of birds
…The scientific question of which larger group of animals birds evolved within has traditionally been called the "origin of birds". The present scientific consensus is that birds are a group of maniraptoran theropod dinosaurs…
Ludiortyx, a fossil bird genus of the Cenozoic
The mounted skeleton of a Velociraptor, showing the very bird-like quality of the smaller theropod dinosaurs
Reconstruction of Iberomesornis romerali, a toothed enantiornithine