ApsaravisHesperornisIchthyornisRheidaeApterygidaeTinamidaeGalliformesAnhimidaeAnatidaeOpisthocomidaePodicipedidaePhoenicopteridaeThreskiornithidaeCariamidaeStrigiformesRecurvirostridaeBurhinidaeAccipitridaeFalconidaeSagittariidaeCuculidaeMusophagidaeCathartidaeGaviidaeSpheniscidaePhaethontidaeFregatidaePhalacrocoracidaeBalaenicipitidaeEurypygidaeArdeidaeCiconiidaeProcellariidaeOtididaePteroclidaeColumbidaeRallidaePsophiidaeGruidaeSteatornithidaePsittaciformesColiiformesTrogonidaeAegothelidaeCoraciidaePasseriformesMorsoravisPumiliornisEocuculusMesitornithidaeOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Mayr_2011d