Western Mindanao (Zamboanga Peninsula) and Basilan, in southern Philippines.
 
Population
Estimated population is unknown (2010) and decreasing.
Status NT
Habitat destruction through logging and forest clearance for agriculture are the main threats.
For more information see BirdLife International Species Factsheet.
Zamboanga Bulbul (Hypsipetes rufigularis) [XC68535]
by Frank Lambert from Mindanao; Zamboanga, Pasonanca Watershed Reserve, Cabonegro, Philippines (call, song)
Zamboanga Bulbul (Hypsipetes rufigularis) [XC68537]
by Stijn De Win \/ Birding2asia.com from Mindanao; Zamboanga, Cabo Negro, Philippines (call)
Subspecies
No subspecies.
Often treated as conspecific with Philippine Bulbul (Hypsipetes philippinus), but is much larger, and no evidence of intergradation where ranges approach each other. Has previously been treated as including subspecies haynaldi of Yellowish Bulbul (Hypsipetes everetti).