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 Perdicinae Bonaparte, 1838
               Genus Lerwa Hodgson, 1837 [monotypic]
                 Lerwa lerwa (Hodgson, 1833) - snow partridge
                   1 Lerwa lerwa lerwaᵀ (Hodgson, 1833)
                   2 Lerwa lerwa major Meinertzhagen, 1927
                   3 Lerwa lerwa callipygia Stegmann, 1938