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 Cuculiformes Wagler, 1830 - cuckoos and plantain-eaters
                     Suborder Cuculi Wagler, 1830 - cuckoos
                       Family Cuculidae Vigors, 1825 - cuckoos
                         1 Subfamily Crotophaginae Swainson, 1837
                         2 Subfamily Neomorphinae Shelley, 1891
                         3 Subfamily Cuculinae Vigors, 1825
                         4 Genus Cuculus Linnaeus, 1758
                         5 Genus Coccyzus Vieillot, 1816
                         6 Genus Geococcyx Wagler, 1831
                         7 Genus Crotophaga Linnaeus, 1758
                         8 Genus Coua Schinz, 1821
                         9 Genus Centropus Illiger, 1811