Size large. Bill very large, stout and much curved ; casque large and broad, covering more than the basal half of the culmen, the sides flat and vertical behind, the top overhanging in front, the posterior edge broad, projecting over the head behind and rounded, the upper surface flat behind, concave in front, terminating anteriorly in two lateral points that are blunted in old birds. No conspicuous crest; feathers of head loose-textured; chin covered with feathers; tail slightly rounded at end. Sexes alike in plumage.
The casque is small and pointed in front in the young and becomes gradually developed as in all Hornbills.
A single species.