Neornithes Gadow, 1893 - living birds
   Palaeognathae - palaeognaths see Cohort Palaeognathae Pycraft, 1900
     ratites see Subcohort Ratitae Merrem, 1813
       Family Dromaiidae Huxley, 1868 - emus
         Genus Dromaius Vieillot, 1816
           Dromaius novaehollandiae (Latham, 1790) - emu
             1 Dromaius novaehollandiae rothschildi (Mathews, 1912)
             2 Dromaius novaehollandiae novaehollandiaeᵀ (Latham, 1790)
             3 ‡Dromaius novaehollandiae diemenensis Le Souef, 1907