Paleornithology n. : The branch of paleontology which treats of fossil birds.

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Taxonomy
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Defination from the web:
Paleornithology. From Wikipedia, the free encyclopedia. Jump to: navigation, search. Paleornithology also known as Avian Paleontology is the scientific study of bird evolution and fossil birds. It is a mix of ornithology and paleontology. Paleornithology began with the discovery of ...