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
             Sylvioidea
               Family Pycnonotidae Gray, 1840 - bulbuls
                 Genus Iole Blyth, 1844
                   1 Iole virescens Blyth, 1845
                   2 Iole propinqua (Oustalet, 1903)
                   3 Iole olivacea Blyth, 1844
                   4 Iole palawanensis (Tweeddale, 1878)