Yellow-bellied Bulbul (Alophoixus phaeocephalus) [XC33418]
by Frank Lambert from Sungai Wain Protection Forest, East Kalimantan, Borneo, Indonesia (call, song)
Yellow-bellied Bulbul (Alophoixus phaeocephalus) [XC150973]
by Greg Irving from Menanggol tributary, Lower Kinabatangan River, Sabah, Borneo, Malaysia (call)
Subspecies
Putative subspecies (caniceps, rufocaudatus, cantori) merged with nominate. Subspecies medius (described from Long Petah, in eastern Borneo) considered indistinguishable from sulphuratus.
The following 4 subspecies are recognised:
phaeocephalus (Hartlaub, 1844) - Extreme southern Myanmar (extreme southern Tenasserim), southern Thailand, Peninsular Malaysia, and Sumatra (including Bangka, Belitung, Siberut and Sipura).