Bubú de Erlanger Laniarius nigerrimus

Strangely variable boubou that can be all black, black above and white below with a small white wingbar, or black above and white below with a yellow eyebrow and a yellow wash on the throat and breast. Uses habitats with a dense understory, including thickets, riparian woodland, and coastal scrub. Usually found in pairs. Black-and-white birds very similar to Zanzibar Boubou, though birds with this coloration may be rare or absent in the western part of the range, where the two species overlap. All-black birds are quite similar to Slate-colored Boubou, but blacker, with different vocalizations. The typical song is a duet in which the male makes a ringing “ku-wee” while the female simultaneously makes a low “chrr” note. Identification of this recently split species is confusing.