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 Pycnonotus Boie, 1826
                   01 Pycnonotus zeylanicus (J.F. Gmelin, 1789)
                   02 Pycnonotus striatus (Blyth, 1842)
                   03 Pycnonotus leucogrammicus (S. Müller, 1836)
                   04 Pycnonotus tympanistrigus (S. Müller, 1836)
                   05 Pycnonotus melanoleucos (Eyton, 1839)
                   06 Pycnonotus priocephalus (Jerdon, 1839)
                   07 Pycnonotus atriceps (Temminck, 1822)
                   08 Pycnonotus melanicterus (J.F. Gmelin, 1789)
                   09 Pycnonotus squamatus (Temminck, 1828)
                   10 Pycnonotus cyaniventris Blyth, 1842
                   11 Pycnonotus jocosus (C. Linnaeus, 1758) - red-whiskered bulbul
                   12 Pycnonotus xanthorrhous Anderson, 1869
                   13 Pycnonotus sinensis (J.F. Gmelin, 1789)
                   14 Pycnonotus taivanus Styan, 1893
                   15 Pycnonotus leucogenys (J.E. Gray, 1835)
                   16 Pycnonotus cafer (C. Linnaeus, 1766) - red-vented bulbul
                   17 Pycnonotus aurigaster (Vieillot, 1818)
                   18 Pycnonotus xanthopygos (Hemprich & Ehrenberg, 1833) - yellow-vented bulbul
                   19 Pycnonotus nigricans (Vieillot, 1818)
                   20 Pycnonotus capensis (C. Linnaeus, 1766)
                   21 Pycnonotus barbatus (Desfontaines, 1789)
                   22 Pycnonotus eutilotus (Jardine & Selby, 1837)
                   23 Pycnonotus nieuwenhuisii (Finsch, 1901)
                   24 Pycnonotus urostictus (Salvadori, 1870)
                   25 Pycnonotus bimaculatus (Horsfield, 1821)
                   26 Pycnonotus finlaysoni Strickland, 1844
                   27 Pycnonotus xantholaemus (Jerdon, 1845)
                   28 Pycnonotus penicillatus Blyth, 1851
                   29 Pycnonotus flavescens Blyth, 1845
                   30 Pycnonotus goiavier (Scopoli, 1786)
                   31 Pycnonotus luteolus (Lesson, 1841)
                   32 Pycnonotus plumosus Blyth, 1845
                   33 Pycnonotus blanfordi Jerdon, 1862
                   34 Pycnonotus simplex Lesson, 1839
                   35 Pycnonotus brunneus Blyth, 1845
                   36 Pycnonotus erythrophthalmus (Hume, 1878) see Pycnonotus erythropthalmos (Hume, 1878)