Phylum Chordata Bateson, 1885 - chordates
   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
           Family Cuculidae Vigors, 1825 - cuckoos
             1 Subfamily Cuculinae Vigors, 1825
             2 Subfamily Phaenicophaeinae
             3 Subfamily Crotophaginae Swainson, 1837
             4 Subfamily Neomorphinae Shelley, 1891
             5 Subfamily Couinae Gray - couas see Family Cuculidae Vigors, 1825
             6 Subfamily Centropodinae Horsfield, 1823