The Accipitriformes are an order that includes most of the diurnal birds of prey: hawks, eagles, vultures, and many others, about 225 species in all. For a long time, the majority view has been to include them with the falcons in the Falconiformes, but many authorities have recognized a separate Accipitriformes. As of 2008, a recent DNA study indicated that falcons are not closely related to the Accipitriformes, being instead related to parrots and passerines.

Since then, the split and the placement of the falcons next to the parrots in taxonomic order has been adopted by the American Ornithologists' Union's South American Classification Committee (SACC), its North American Classification Committee (NACC), and the International Ornithological Congress (IOC). The British Ornithologists' Union already recognized the Accipitriformes, and has adopted the move of Falconiformes. The DNA-based proposal and the NACC and IOC classifications include the New World vultures in the Accipitriformes, while the SACC classifies the New World vultures as a separate order, the Cathartiformes. The latter view has been adopted here.

https://en.wikipedia.org/wiki/Accipitriformes

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Professor Farnsworth
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