Mid-sized, generic-looking warbler-like bird. Males have a matte black back, a white wing patch, and very pale yellowish underparts. Females are similar, but browner on the back. Found mainly in broadleaf savanna, and locally in humid forest. Usually in pairs or small groups, which will join mixed-species feeding flocks. The quiet vocalizations include chatty calls and trills. Very similar to Yellow-bellied Hyliota. In most of the range, Southern males distinguished by the smaller white patch on the wing, and females by their browner upperparts. In Uganda and Kenya, males are extremely similar, but Southern can still be recognized by its non-glossy black back.