Class Aves Linnaeus, 1758 - birds see Subclass Aves Linnaeus, 1758
   Subclass Neornithes Gadow, 1893 see Clade Neornithes Gadow, 1893
     Infraclass Neoaves Sibley et al., 1988 see Subcohort Neoaves Sibley et al., 1988
       Parvclass Passerae see Superorder Passerimorphae Sibley et al., 1988
         Superorder Passerimorphae Sibley et al., 1988
           Order Passeriformes Linnaeus, 1758
             Suborder Passeri see Suborder Passeres (C. Linnaeus, 1758) C. Linnaeus, 1766
               Parvorder Passerida (C. Linnaeus, 1758) Sibley et al., 1988
                 Superfamily Sylvioidea
                   Family Pycnonotidae Gray, 1840 - bulbuls
                     Genus Hypsipetes Vigors, 1831
                       1 Hypsipetes mcclellandii Horsfield, 1840 see Ixos mcclellandii (Horsfield, 1840)
                       2 Hypsipetes virescens (Temminck, 1825) see Ixos virescens Temminck, 1825
                       3 Hypsipetes madagascariensis (P.L. Statius Müller, 1776)
                       4 Hypsipetes crassirostris E. Newton, 1867
                       5 Hypsipetes parvirostris Milne-Edwards & Oustalet, 1885
                       6 Hypsipetes borbonicus (J.R. Forster, 1781) - olivaceous bulbul
                       7 Hypsipetes leucocephalus (J.F. Gmelin, 1789)
                       8 Hypsipetes nicobariensis Moore, 1854 see Ixos nicobariensis (F. Moore, 1854)
                       9 Hypsipetes thompsoni (Bingham, 1900) see Cerasophila thompsoni Bingham, 1900