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] Passeriformes Linnaeus, 1758
         suboscines see Suborder Suboscines
           Tyranni see Suborder Tyranni
             Family Tyrannidae Vigors, 1825 - tyrant-flycatchers
               Genus Serpophaga Gould, 1839
                 1 Serpophaga cinerea (Tschudi, 1844) - torrent tyrannulet
                 2 Serpophaga hypoleuca Sclater & Salvin, 1866 - river tyrannulet
                 3 Serpophaga nigricans (Vieillot, 1817) - sooty tyrannulet
                 4 Serpophaga subcristata (Vieillot, 1817) - white-crested tyrannulet
                 5 Serpophaga munda Berlepsch, 1893 - white-bellied tyrannulet