Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Passeriformes Linnaeus, 1758
         oscines see Suborder Oscines
           Passerida - passeridans see Parvorder Passerida (C. Linnaeus, 1758) Sibley et al., 1988
             Passeroidea
               Family Fringillidae Leach, 1820 - finches and Hawaiian honeycreepers
                 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