Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
             Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
               Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
                 Order Piciformes Meyer & Wolf, 1810 - scansorial birds
                   Superfamily Picoidea Vigors, 1825
                     Family Picidae Vigors, 1825 - woodpeckers
                       Subfamily Picinae Vigors, 1825 - true woodpeckers
                         Genus Picus Linnaeus, 1758
                           1 Picus viridis Linnaeus, 1758 - Eurasian green woodpecker
                           2 Picus canus J.F. Gmelin, 1788 - grey-faced woodpecker
                           3 Picus puniceus Horsfield, 1821 - crimson-winged woodpecker