Nestoridae and Strigopidae are described in the same article, Bonaparte, C.L. (1849) Conspectus Systematis Ornithologiae. Therefore, under rules of the International Code of Zoological Nomenclature, the first reviser determines priority, which is Bonaparte, C.L. (1850), Conspectus Generum Avium, E.J. Brill, Leyden.
