We, the U.S. Fish and Wildlife Service, revise the List of Migratory Birds by both adding and removing species. Reasons for the changes to the list include adding species based on new taxonomy and new evidence of occurrence in the United States or U.S. territories, removing species no longer known to occur within the United States, and changing names to conform to accepted use. The net increase of 19 species (23 added and 4 removed) brings the total number of species protected by the Migratory Bird Treaty Act (MBTA) to 1,026. We regulate most aspects of the taking, possession, transportation, sale, purchase, barter, exportation, and importation of migratory birds. An accurate and up-to-date list of species protected by the MBTA is essential for public notification and regulatory purposes.