Cabanis and Reichenow, 1877,
Chinchoxo, Loango coast (Cabinda).
Hitherto considered conspecific with B. cylindricus, but differs in its coal-black (not sooty-brown) cheeks (NHMUK specimens of cylindricus show no evidence of the reddish flecking on cheeks, throat and neck sides that is stated and illustrated—including here—as a distinguishing feature) (2); periorbital skin pale yellow vs pinkish (NHMUK specimen label) or red (HBW) (2); upper thighs all white vs black (ns ); bill of male dark brown except for creamy tip and base vs all creamy (3); bill and casque of male only slightly vs heavily grooved (2); casque of male structured differently, with large “single” downcurving structure reaching low-elevated forward-pointing tip close to tip of bill vs large “double” structure (high, rather flat cylinder atop a supporting fan) that sheers off two-thirds down the upper mandible, leaving “tip” far from bill tip (and roughly equidistant from commissure) (3); black tailbar slightly narrower (ns). Monotypic.
SW Nigeria and perhaps#R Benin E to W Uganda and S to Congo, DRCongo and N Angola.
Food and feeding
Status and conservation
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