Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Cuculiformes Wagler, 1830 - cuckoos and plantain-eaters
         Family Cuculidae Vigors, 1825 - cuckoos
           Subfamily Cuculinae Vigors, 1825
             Genus Pachycoccyx Cabanis, 1882 [monotypic]
               Pachycoccyx audeberti (Schlegel, 1879) - thick-billed cuckoo
                 1 Pachycoccyx audeberti brazzae (Oustalet, 1886)
                 2 Pachycoccyx audeberti validus (Reichenow, 1879)
                 3 Pachycoccyx audeberti audeberti (Schlegel, 1879)