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 Tympanuchus Gloger, 1841
                 Tympanuchus cupido (Linnaeus, 1758) - greater prairie chicken
                   1 Tympanuchus cupido pinnatus (Brewster, 1885)
                   2 Tympanuchus cupido attwateri Bendire, 1893 - Attwater's greater prairie chicken
                   3 ‡Tympanuchus cupido cupidoᵀ (Linnaeus, 1758)