Phylum Chordata Bateson, 1885 - chordates
   Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
     Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
       Superorder Neognathae Pycraft, 1900 see Cohort Neognathae Pycraft, 1900
         Order Galliformes Temminck, 1820 - fowl
           Family Tetraonidae Vigors, 1825
             Genus Tympanuchus Gloger, 1841
               1 Tympanuchus phasianellus (Linnaeus, 1758) - sharp-tailed grouse
               2 Tympanuchus cupido (Linnaeus, 1758) - greater prairie chicken
               3 Tympanuchus pallidicinctus (Ridgway, 1873) - lesser prairie chicken