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 Carduelini see Subfamily Carduelinae Vigors, 1825
                         Genus Loxia Linnaeus, 1758
                           1 Loxia pytyopsittacus Borkhausen, 1793
                           2 Loxia scotica E. Hartert, 1904
                           3 Loxia curvirostra Linnaeus, 1758 - red crossbill
                           4 Loxia leucoptera J.F. Gmelin, 1789 - white-winged crossbill