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 Centrocercus Swainson, 1832
                 1 Centrocercus urophasianus (Bonaparte, 1827) - greater sage grouse
                 2 Centrocercus minimus Young, Braun, Oyler-McCance, Quinn & Hupp, 2000 - Gunnison sage grouse