The Black Honeyeater feeds on insects and nectar, probing flowers and foliage with its long fine bill. It is mainly found in the crowns of eucalypts, at clumps or mistletoe or in shrubs, especially Emu-bush,Eremophila. Normally found alone, in pairs or small flocks, it may sometimes form large mixed flocks at food sources, associating with other honeyeaters such as the Pied Honeyeater and woodswallows e.g. White-browed Woodswallows, Artamus superciliosus. Black Honeyeaters, particularly females, have often been recorded eating charcoal and ash from old camp-fires.