Bradley Curtis Livezey (June 15, 1954 – February 8, 2011) was an American ornithologist with scores of publications.
In 1985 he completed a PhD with his thesis Systematics and flightlessness of steamer-ducks (Anatidae: Tachyeres) at the University of Kansas.
In 1993, he was hired as Associate Curator of Birds at Carnegie Museum of Natural History in Pittsburgh and was awarded full curatorship in 2001.
Livezey's research work dealt with controversial areas of bird phylogenetics and taxonomy.
Perhaps his greatest legacy is the Higher-Order Phylogeny of Modern Birds, co-authored over the course of 10 years with associate Richard L. Zusi of the Smithsonian Institution.