The greenbuls are a group of birds within the bulbul family Pycnonotidae, found only within Africa. They are all largely drab olive-green above, and paler below, with few distinguishing features.
The "aberrant greenbuls" of the genera Bernieria and Xanthomixis are actually Malagasy warblers (Cibois et al. 2001). To recognize this, they are also called Bernieria and tetrakas rather than greenbuls. Likewise, the golden greenbul (Calyptocichla serina) is not a typical greenbul, but apparently the representative of a distinct and ancient lineage of bulbuls, which might include the black-collared bulbul, Neolestes torquatus (Moyle & Marks 2006). A few species within some of the genera in this group are called brownbuls or leafloves.
Genus Phyllastrephus
Cabanis's greenbul, Phyllastrephus cabanisi
Fischer's greenbul, Phyllastrephus fischeri
Placid greenbul, Phyllastrephus placidus
Pale-olive greenbul, Phyllastrephus fulviventris
Grey-olive greenbul, Phyllastrephus cerviniventris
Baumann's olive greenbul, Phyllastrephus baumanni
Toro olive greenbul, Phyllastrephus hypochloris
Cameroon olive greenbul, Phyllastrephus poensis
Sassi's olive greenbul, Phyllastrephus lorenzi
Yellow-streaked greenbul, Phyllastrephus flavostriatus
Grey-headed greenbul, Phyllastrephus poliocephalus
Lowland tiny greenbul, Phyllastrephus debilis
Montane tiny greenbul, Phyllastrephus albigula
White-throated greenbul, Phyllastrephus albigularis
Icterine greenbul, Phyllastrephus icterinus
Liberian greenbul, Phyllastrephus leucolepis
Xavier's greenbul, Phyllastrephus xavieri
Genus Arizelocichla
Cameroon greenbul or Cameroon mountain greenbul, Arizelocichla montana
Shelley's greenbul, Arizelocichla masukuensis
Mountain greenbul or eastern mountain greenbul, Arizelocichla nigriceps
Western greenbul, Arizelocichla tephrolaema
Stripe-cheeked greenbul, Arizelocichla milanjensis
Genus Eurillas
Little greenbul, Eurillas virens
Little grey greenbul, Eurillas gracilis
Ansorge's greenbul, Eurillas ansorgei
Plain greenbul, Eurillas curvirostris
Yellow-whiskered greenbul, Eurillas latirostris
Genus Stelgidillas
Slender-billed greenbul, Stelgidillas gracilirostris
Genus Andropadus
Sombre greenbul, Andropadus importunus
Genus Criniger
Eastern bearded greenbul, Criniger chloronotus
Western bearded greenbul, Criniger barbatus
White-bearded greenbul, Criniger ndussumensis
Red-tailed greenbul, Criniger calurus
Yellow-bearded greenbul, Criniger olivaceus
Genus Thescelocichla
Swamp greenbul, Thescelocichla leucopleura
Genus Chlorocichla
Simple greenbul, Chlorocichla simplex
Yellow-necked greenbul, Chlorocichla falkensteini
Yellow-bellied greenbul, Chlorocichla flaviventris
Joyful greenbul, Chlorocichla laetissima
Prigogine's greenbul, Chlorocichla prigoginei
Genus Ixonotus - tentatively placed here
Spotted greenbul, Ixonotus guttatus
Genus Baeopogon
Honeyguide greenbul, Baeopogon indicator
Sjostedt's greenbul, Baeopogon clamans
Genus Calyptocichla
Golden greenbul, Calyptocichla serinus