Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Eoaves Sibley et al., 1988 see Cohort Palaeognathae Pycraft, 1900
       Parvclass Ratitae (Merrem, 1813) see Subcohort Ratitae Merrem, 1813
         Order Struthioniformes Latham, 1790
           Suborder Casuarii see Order Casuariiformes Sclater, 1880
             Family Apterygidae Gray, 1840 - kiwis
               Genus Apteryx Shaw, 1813
                 Apteryx australis Shaw, 1813 - brown kiwi