Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Picae (C. Linnaeus, 1758) see Order Piciformes Meyer & Wolf, 1810
         Order Piciformes Meyer & Wolf, 1810 - scansorial birds
           Infraorder Picides see Suborder Pici Meyer & Wolf, 1810
             Family Picidae Vigors, 1825 - woodpeckers
               Genus Picoides Lacépède, 1799
                 01 Picoides lignarius (Molina, 1782) - striped woodpecker
                 02 Picoides mixtus (Boddaert, 1783) - checkered woodpecker
                 03 Picoides nuttallii (Gambel, 1843) - Nuttall's woodpecker
                 04 Picoides scalaris (Wagler, 1829) - ladder-backed woodpecker
                 05 Picoides pubescens (C. Linnaeus, 1766) - downy woodpecker
                 06 Picoides borealis (Vieillot, 1809) - red-cockaded woodpecker
                 07 Picoides stricklandi (Malherbe, 1845) - Strickland's woodpecker
                 08 Picoides villosus (C. Linnaeus, 1766) - hairy woodpecker
                 09 Picoides albolarvatus (Cassin, 1850) - white-headed woodpecker
                 10 Picoides tridactylus (C. Linnaeus, 1758) - three-toed woodpecker
                 11 Picoides arcticus (Swainson, 1832) - black-backed woodpecker