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Are flightless birds 'non-avian dinosaurs'?

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Birds are thought to have evolved from a group of non-avian dinosaurs known as maniraptorans (some believe that they might even be dromaeosaurids). read more

The term “non-avian dinosaur” does not refer to non-flying dinosaurs. It refers to all dinosaurs that do not belong to the clade “Aves”, with is a subclade within the larger clade of dinosauria. Flightless modern birds all belong in the clade “Aves”, and thus are Avian dinosaurs, not non-avian dinosaurs. read more

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