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The southern yellow-billed hornbill

18 January 2016

 

www.leopard.tvThe southern yellow-billed hornbill Tockus leucomelas is one of ten types of hornbill in southern Africa of which the southern ground hornbill Bucorvus leadbeateri is by far the largest, while Monteiro’s hornbill Tockus monteiri and the Damara hornbill Tockus damarensis only occur in central, north-western Namibia and south-western Angola. Bradfield’s hornbill Tockus bradfieldi occurs from extreme north-central Namibia into south-eastern Angola, north-western Zimbabwe and south-western Zambia. The rarest hornbill in southern Africa is the silvery-cheeked hornbill Bycanistes brevis of north-eastern southern Africa, but its range extends north along mountain forests into the Ethiopian Highlands.

The southern yellow-billed hornbill was first described scientifically in 1842 as Buceros leucomelas by Lichtenstein based on a specimen that was collected between Bloemhof and Commando Drift along the Vaal River. The generic name Tockus refers to its typical clucking call and the specific name leucomelas is Latin for black and white. It occurs from southern Angola, southern Zambia and southern Malawi south through Namibia, Botswana and Zimbabwe into the north-central and north-eastern bushveld parts of South Africa.

The adult, southern yellow-billed hornbill is 40 to 60 cm tall and the male weighs some 210 g as opposed to 170 g in the female. The sexes... (Become a subscriber for more)

 

Reference:

Hockey, P A R, W R J Dean and P G Ryan (Eds) 2005. Roberts – Birds of southern Africa, seventh edition. Cape Town: Trustees of the John Voelcker Bird Book Fund, pp 152 - 153.

article by Prof J du P Bothma

 

 

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