Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
  Count: [s] 23o;144f;2043g;9628s;2127ss; ‡1f;21g;74s;12ss
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
    Count: [s] 21o;139f;2029g;9571s;2115ss; ‡1f;21g;74s;12ss
       Parvclass Coraciae see Order Coraciiformes Forbes, 1884
      Count: [s] 5o;17f;67g;309s;58ss
         Superorder Bucerotimorphae see Suborder Bucerotes Fürbringer, 1888
        Count: [s] 2o;5f;12g;66s;10ss
           Order Bucerotiformes Fürbringer, 1888 see Infraorder Bucerotides Fürbringer, 1888
          Count: [s] 2f;9g;56s;6ss
             Family Bucerotidae Vigors - hornbills
            Count: -
               Genus Aceros Hodgson, 1844
              Count: [*] 11s
                 Aceros undulatus (Shaw, 1811) - wreathed hornbill see Rhyticeros undulatus (Shaw, 1811)
                Count: -