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 Coraciiformes Forbes, 1884 - rollerlike birds
                     01 Family Alcedinidae Bonaparte, 1831 - kingfishers
                     02 Family Todidae Vigors, 1825 - todies
                     03 Family Momotidae Gray - motmots
                     04 Family Meropidae Vigors, 1825 - bee-eaters
                     05 Family Coraciidae Batsch, 1788 - rollers
                     06 Family Brachypteraciidae Sharpe, 1892 - ground rollers
                     07 Family Leptosomatidae Bonaparte, 1850, nom. null. - cuckoo-rollers see Family Leptosomidae Blyth, 1838
                     08 Family Upupidae Bonaparte, 1831 - hoopoes
                     09 Family Phoeniculidae Sclater, 1924 - wood hoopoes
                     10 Family Bucerotidae Vigors - hornbills