The Zamboanga bulbul (Hypsipetes rufigularis) is a songbird species in the bulbul family (Pycnonotidae). It was one of the species of Ixos that now usually warrants inclusion in the genus Hypsipetes – as long as this is kept separate from Ixos – as it may be a close relative of the Philippine bulbul (H. philippinensis), which in turn is closely related to the type species of Hypsipetes, the black bulbul (H. leucocephalus). It is endemic to the Philippines, where its natural habitat is subtropical or tropical moist lowland forests. It is becoming rare due to habitat loss.