Warm-blooded, feathered vertebrates that lay hard-shelled eggs, with forelimbs modified into wings and, in the great majority of species, the capacity for powered flight. Aves is now understood by paleontologists to be the one surviving lineage of dinosaurs, directly descended from small feathered theropods.
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Member Species/Taxa CountApproximate described-species (or, for a genus, described-taxon) count; continually revised as species are newly described, reclassified or synonymized. Taxonomic Rank Scientific Name Aves
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