Usually foraging on the ground or in low bushes, the black scrub-robin often probes seemingly bare sand or soil under bushes for food. Little information is available on the diet of this species (2), but like other members of the Muscicapidae family it probably feeds on insects, and perhaps also some fruit (4).
The breeding season of the black scrub-robin varies with location, ranging from February to July in Senegal, from May to August in Ethiopia, and from March to July in the Arabian Peninsula (2). The nest is built around one to two metres above the ground, in a small palm, bush or tree, or in a crevice in a tree trunk or a building. Constructed from dry grass, palm fibres, twigs and small roots, it is a flat, ragged cup shape, lined with hair, wool and fine grass. Between two and four eggs are laid, and are pale greenish to greenish-grey in colour, with grey, olive or reddish-brown speckles. Little else is known about the breeding biology of this species (2).