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 Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
         Superorder Gallomorphae see Order Galliformes Temminck, 1820
           Order Galliformes Temminck, 1820 - fowl
             Parvorder Phasianida see Suborder Phasiani Vigors, 1825
               Superfamily Phasianoidea Vigors, 1825
                 Family Phasianidae Vigors, 1825 - turkeys, grouse, pheasants, partridges
                   Genus Bonasa Stephens, 1819
                     1 Bonasa bonasia (C. Linnaeus, 1758) - hazel grouse see Tetrastes bonasia (Linnaeus, 1758)
                     2 Bonasa sewerzowi (Przewalski, 1876) - Chinese grouse see Tetrastes sewerzowi Przevalski, 1876
                     3 Bonasa umbellus (Linnaeus, 1766) - ruffed grouse