Closely related to S. dicruroides, S. lugubris and S. musschenbroeki, and commonly considered conspecific, but already treated as separate species in HBW; evidence assembled by one author#R indicates that it differs in distinct song (allow 3); greatly reduced white barring on undertail-coverts and undertail (2); purplish-black unglossed plumage unlike that of lugubris and dicruroides (2); shorter tail (based on data for males#R, effect size compared with next shortest form, lugubris, –5.1; score 3); different juvenile plumage (plain rufous-brown vs white-spotted blackish) (3). Sometimes treated as monotypic. Three subspecies recognized.
Food and feeding
Status and conservation
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