Neornithes Gadow, 1893 - living birds
   Neognathae Pycraft 1900 see Cohort Neognathae Pycraft, 1900
     Neoaves Sibley et al. 1988 see Subcohort Neoaves Sibley et al., 1988
       [Order] Strigiformes Wagler, 1830 - owls
         Family Strigidae Vigors, 1825 - owls
           Subfamily Surniinae del Hoyo et al., 2014
             Genus Glaucidium Boie, 1826
               Glaucidium brasilianum (J.F. Gmelin, 1788) - ferruginous pygmy-owl
                 01 Glaucidium brasilianum cactorum van Rossem, 1937
                 02 Glaucidium brasilianum ridgwayi Sharpe, 1875
                 03 Glaucidium brasilianum medianum Todd, 1916
                 04 Glaucidium brasilianum margaritae Phelps & Phelps Jr., 1951
                 05 Glaucidium brasilianum phalaenoides (Daudin, 1800)
                 06 Glaucidium brasilianum duidae Chapman, 1929
                 07 Glaucidium brasilianum olivaceum Chapman, 1939
                 08 Glaucidium brasilianum ucayalae Chapman, 1929
                 09 Glaucidium brasilianum brasilianum (Gmelin, 1788)
                 10 Glaucidium brasilianum pallens Brodkorb, 1938
                 11 Glaucidium brasilianum stranecki König & Wink, 1995
                 12 Glaucidium brasilianum tucumanum Chapman, 1922