Hornbills (Bucerotidae)

Eastern Yellow-billed Hornbill (Tockus flavirostris) - HBW 6, p. 495

French: Calao à bec jaune German: Östlicher Gelbschnabeltoko Spanish: Toco Piquigualdo Norteño
Other common names: Yellow-billed Hornbill

Taxonomy: Buceros flavirostris Rüppell, 1835, Taranta Mountains, Ethiopia.
Sometimes considered to form a superspecies with T. leucomelas, and in past usually treated as conspecific, but differs in voice and bare-part colours. These two closely related to T. deckeni, and also, more distantly, to T. monteiri and T. erythrorhynchus, based on similar calls and behaviour, and DNA studies. Slightly smaller birds from NE Somalia described as race somaliensis, mainly on basis of orange markings on bill, but this character apparently variable; further research required. Monotypic.

Distribution: Ethiopia, Djibouti and Somalia S to SE Sudan, NE Uganda, Kenya and NE Tanzania.