living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Animalia Linnaeus, 1758 - animals
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
                   Order Psittaciformes Wagler, 1830 - parrots
                     Family Psittacidae Illiger, 1811 - cockatoos and parrots
                       1 Genus Myiopsitta Bonaparte, 1854
                       2 Genus Lorius Vigors, 1825
                       3 Genus Cacatua Vieillot, 1817
                       4 Genus Psittacus Linnaeus, 1758
                       5 Genus Psittacula Cuvier, 1800
                       6 Genus Ara Lacépède, 1799
                       7 Genus Aratinga Spix, 1824
                       8 Genus Amazona Lesson, 1830