Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Galloanserae Sibley, Ahlquist & Monroe Jr., 1988 see Subcohort Galloanserae Sibley, Ahlquist & Monroe Jr., 1988
       [Order] Galliformes Temminck, 1820 - fowl
         phasianoids see Superfamily Phasianoidea Vigors, 1825
           Family Phasianidae Vigors, 1825 - turkeys, grouse, pheasants, partridges
             Subfamily Tetraoninae Vigors - grouse see Family Tetraonidae Vigors, 1825
               Genus Dendragapus Elliot, 1864 [monotypic]
                 Dendragapus obscurus (Say, 1823) - blue grouse
                   1 Dendragapus obscurus sitkensis Swarth, 1921
                   2 Dendragapus obscurus fuliginosus (Ridgway, 1873) - sooty grouse
                   3 Dendragapus obscurus richardsonii (Douglas, 1829)
                   4 Dendragapus obscurus pallidus Swarth, 1931
                   5 Dendragapus obscurus sierrae Chapman, 1904
                   6 Dendragapus obscurus howardi Dickey & van Rossem, 1923
                   7 Dendragapus obscurus oreinus Behle & Selander, 1951
                   8 Dendragapus obscurus obscurusᵀ (Say, 1823) - dusky grouse