Like many bulbuls, the Mauritius black bulbul mainly feeds on a diverse range of fruit, but will also take arboreal insects such as bush crickets, butterflies, caterpillars and stick-insects, and will sometimes take small vertebrates such as native geckos (Phelsuma sp.) (2) (3). The foraging habit of this species is strictly arboreal, with food items seldom collected from the ground (2).
The Mauritius black bulbul is usually found in pairs or small groups of up to eight individuals (2) (3). Nesting has been observed between November and February, with breeding pairs defending a small territory, within which the female builds a coarse nest around two to nine metres off the ground in a low bush or tree. Usually around three eggs are laid, which are incubated for 15 to 16 days before hatching. The young are fed by both parent birds and may remain in the same territory for some time (2).