Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Palaeognathae Pycraft, 1900 see Cohort Palaeognathae Pycraft, 1900
         Order Casuariiformes Sclater, 1880
           1 Family Casuariidae Kaup, 1847 - cassowaries
           2 Family Dromaiidae Huxley, 1868 - emus