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
         oscines see Suborder Oscines
           Passerida - passeridans see Parvorder Passerida (C. Linnaeus, 1758) Sibley et al., 1988
             Passeroidea
               Family Motacillidae Horsfield, 1821 - wagtails, pipits
                 Genus Tmetothylacus Cabanis, 1879 [monotypic]
                   1 Tmetothylacus tenellus (Cabanis, 1878)