living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
Ref: S.P. Parker, 1982
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
  Ref: J.O. Corliss, 1982: 55
     Kingdom Animalia Linnaeus, 1758 - animals
    Ref: W.J. Bock, 1982: 489-490
       Subkingdom Eumetazoa Butschli, 1910 see [unranked] Eumetazoa Bütschli, 1910
      Ref: W.J. Bock, 1982: 490, 667
         Phylum Chordata Bateson, 1885 - chordates
        Ref: W.J. Bock, 1982: 822
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
          Ref: W.J. Bock, 1982: 830
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
            Ref: W.J. Bock, 1982: 967
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
              Ref: W.J. Bock, 1982: 967
                 Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
                Ref: W.J. Bock, 1982: 969-970
                   Order Strigiformes Wagler, 1830 - owls
                  Ref: W.J. Bock, 1982: 989
                     1 Family Tytonidae Mathews, 1912 - barn owls
                    Ref: W.J. Bock, 1982: 989
                     2 Family Strigidae Vigors, 1825 - owls
                    Ref: W.J. Bock, 1982: 989