Temporal range: Eocene to present
The order Cathartiformes of raptors or birds of prey includes the New World vultures and the now-extinct Teratornithidae. These raptors are classified by most taxonomic authorities in the order Accipitriformes (which includes the eagles and hawks). In the past, they were considered to be a sister group to the storks of the order Ciconiiformes based on DNA–DNA hybridization and morphology.
- Chatterjee, Sankar; Templin, R. Jack Jr.; Campbell, Kenneth E. (July 24, 2007). "The aerodynamics of Argentavis, the world's largest flying bird from the Miocene of Argentina". Proceedings of the National Academy of Sciences. 104 (30): 12398–12403. doi:10.1073/pnas.0702040104. PMC 1906724. PMID 17609382.[failed verification]
- Ligon, J. David. "Relationships of the cathartid vultures." (1967).
- Sibley, Charles Gald & Ahlquist, Jon Edward (1990): Phylogeny and classification of birds. Yale University Press, New Haven, Conn.
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