Louis Vieillot

Louis Pierre Vieillot (May 10, 1748, Yvetot – August 24, 1830, Sotteville-lès-Rouen) was a French ornithologist.

Vieillot is the author of the first scientific descriptions and Linnaean names of a number of birds, including species he collected himself in the West Indies and North America and South American species discovered but not formally named by Felix de Azara and his translator Sonnini de Manoncourt. At least 26 of the genera erected by Vieillot are still in use. He was among the first ornithologists to study changes in plumage and one of the first to study live birds.

Vieillot was born in Yvetot. He represented his family's business interests in Saint-Domingue (Haiti) on Hispaniola, but fled to the United States during the Haitian rebellions that followed the French Revolution. On Buffon's advice, he collected material for the Histoire naturelle des oiseaux de l'Amérique Septentrionale, the first two volumes of which were published in France beginning in 1807.

Vieillot returned to France for the last time in 1798,where the position created for him at the Bulletin des Lois left him sufficient leisure to continue his natural history studies. Following the death of Jean Baptiste Audebert, Vieillot saw the two parts of the "Oiseaux dorés" through to completion in 1802; his own Histoire naturelle des plus beaux oiseaux chanteurs de la zone torride appeared in 1806.

Vieillot's Analyse d'une nouvelle Ornithologie Elémentaire (1816) set out a new system of ornithological classification, which he applied with slight modifications in his contributions to the Nouveau Dictionnaire d'Histoire Naturelle (1816–19). In 1820, Vieillot undertook the continuation of the Tableau encyclopédique et méthodique, commenced by Pierre Joseph Bonnaterre in 1790. He also published an Ornithologie française (1823–30).

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