Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
  Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
     Infraclass Eoaves Sibley et al., 1988 see Cohort Palaeognathae Pycraft, 1900
    Count: [s] 2o;5f;14g;57s;12ss
       Parvclass Ratitae (Merrem, 1813) see Subcohort Ratitae Merrem, 1813
      Count: [s] 2o;5f;14g;57s;12ss
         Order Struthioniformes Latham, 1790
        Count: -
           Suborder Casuarii see Order Casuariiformes Sclater, 1880
          Count: [*] 2f;3g;7s
             Family Casuariidae Kaup, 1847 - cassowaries
            Count: [*] 2g;4s
               1 Tribe Casuariini - cassowaries see Family Casuariidae Kaup, 1847
              Count: [*] 1g;3s
               2 Tribe Dromaiini - emus see Family Dromaiidae Huxley, 1868
              Count: [*] 1g;1s