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] Coraciiformes Forbes, 1884 - rollerlike birds
         Family Bucerotidae Vigors - hornbills
           Genus Rhyticeros Reichenbach, 1849
             1 Rhyticeros plicatus (J.R. Forster, 1781)
             2 Rhyticeros narcondami Hume, 1873
             3 Rhyticeros subruficollis (Blyth, 1843)
             4 Rhyticeros undulatus (Shaw, 1811)
             5 Rhyticeros everetti (Rothschild, 1897)