Birds evolved from theropod dinosaurs during the Late Jurassic period. The earliest evolution of the Avialae, a clade that includes all modern birds but excludes certain dinosaurs like Deinonychus and Troodon, has
Birds evolved from theropod dinosaurs during the Late Jurassic period. The earliest evolution of the Avialae, a clade that includes all modern birds but excludes certain dinosaurs like Deinonychus and Troodon, has
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