Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Passeriformes Linnaeus, 1758
             Suborder Passeri see Suborder Passeres (C. Linnaeus, 1758) C. Linnaeus, 1766
               Parvorder Passerida (C. Linnaeus, 1758) Sibley et al., 1988
                 Superfamily Passeroidea
                   Family Fringillidae Leach, 1820 - finches and Hawaiian honeycreepers
                     Subfamily Fringillinae Leach, 1820
                       Tribe Drepanidini see Subfamily Drepanidinae
                         Genus Hemignathus Lichtenstein, 1839
                           Hemignathus obscurus (J.F. Gmelin, 1788) - hawaiian 'akialoa see Akialoa obscura (J.F. Gmelin, 1788)
                             Hemignathus obscurus ellisianus (Gray, 1859) see Akialoa ellisiana (Gray, 1859)