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 Hypsipetes Vigors, 1831
                   1 Hypsipetes crassirostris E. Newton, 1867
                   2 Hypsipetes borbonicus (J.R. Forster, 1781) - olivaceous bulbul
                   3 Hypsipetes madagascariensis (P.L. Statius Müller, 1776)
                   4 Hypsipetes parvirostris Milne-Edwards & Oustalet, 1885
                   5 Hypsipetes leucocephalus (J.F. Gmelin, 1789)