Bulbuls (Pycnonotidae)

Yellow-bellied Bulbul (Alophoixus phaeocephalus) - HBW 10, p. 227

French: Bulbul à calotte grise German: Schwefelbülbül Spanish: Bulbul Capirotado
Other common names: Grey-headed (Bearded) Bulbul, Crestless White-throated Bulbul

Taxonomy: Ixos (Trichixos, Less.) phaeocephalus Hartlaub, 1844, Melaka, Peninsular Malaysia.
Genus often merged with Criniger; recent molecular evidence, however, strongly supports the view that the relationship between the two is remote, despite close similarity in appearance. DNA analysis suggests that present species is not close to other members of genus, and that it should possibly be separated in a monotypic genus. Delimitation of races in Borneo complex, variation appearing clinal, and perhaps only extremes worthy of recognition; listed ranges indicate evident ranges where known, but species probably present throughout; further study required. Three putative races (c.. View all taxonomy...

Taxonomy: Ixos (Trichixos, Less.) phaeocephalus Hartlaub, 1844, Melaka, Peninsular Malaysia.
Genus often merged with Criniger; recent molecular evidence, however, strongly supports the view that the relationship between the two is remote, despite close similarity in appearance. DNA analysis suggests that present species is not close to other members of genus, and that it should possibly be separated in a monotypic genus. Delimitation of races in Borneo complex, variation appearing clinal, and perhaps only extremes worthy of recognition; listed ranges indicate evident ranges where known, but species probably present throughout; further study required. Three putative races (caniceps, rufocaudatus, cantori) merged with nominate; medius (described from Long Petah, in E Borneo) considered indistinguishable from sulphuratus. Four subspecies recognized.

Subspecies and Distribution:

  • phaeocephalus (Hartlaub, 1844) - extreme S Myanmar (extreme S Tenasserim), S Thailand, Peninsular Malaysia, and Sumatra (including Bangka, Belitung, Siberut and Sipura).
  • connectens Chasen & Kloss, 1929 - NE Borneo.
  • sulphuratus (Bonaparte, 1850) - C Borneo (E Sarawak and W Sabah S to SE Kalimantan).
  • diardi (Finsch, 1867) - W Borneo (S from R Baram).