ApsaravisHesperornisIchthyornisRheidaeApterygidaeTinamidaeGalliformesAnhimidaeAnatidaeOpisthocomidaePodicipedidaePhoenicopteridaeThreskiornithidaeCariamidaeStrigiformesRecurvirostridaeBurhinidaeAccipitridaeFalconidaeSagittariidaeCuculidaeMusophagidaeCathartidaeGaviidaeSpheniscidaePhaethontidaeFregatidaePhalacrocoracidaeBalaenicipitidaeEurypygidaeArdeidaeCiconiidaeProcellariidaeOtididaePteroclidaeColumbidaeRallidaePsophiidaeGruidaeSteatornithidaePsittaciformesColiidaeTrogonidaeAegothelidaeCoraciidaePasseriformesIGM_100_slash_1447Eogrus_aeolaEogrus_wetmoreiOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Clarke_etal_2005ba