The Southern Red-billed Hornbill (Tockus rufirostris) is a species of hornbill in the family Bucerotidae, which is native to the savannas and dryer bushlands of southern Africa. It is replaced by a near-relative, the Damara red-billed hornbill, in the arid woodlands of western Namibia. All five red-billed hornbills were formerly considered conspecific.
Range It is found from Malawi and Zambia to southern Angola, northeastern Namibia, Botswana, Zimbabwe, eastern Swaziland and northern South Africa (Transvaal and northern KZN province). It occurs in the upper Zambezi valley of Mozambique, but is mostly absent from the eastern lowlands.
Range map from www.oiseaux.net - Ornithological Portal Oiseaux.net
www.oiseaux.netis one of those MUST visit pages if you're in to bird watching. You can find just about everything there
Description The sexes are similar, but males are larger and heavier. Males also have somewhat longer bills, with the lower mandible coloured black to a variable extent.
It is distinguishable from other red-billed hornbills by the combination of yellow iris and pale orbital skin (pink to greyish), and the ample blackish plumage streaking from the ear coverts to the side of the neck.
The throat is white, and the wing coverts clearly spotted.
Male head in profile T. r. rufirostris
By Philogène Wytsman (d. 1925) - Genera Avium, Public Domain, https://commons.wikimedia.org/w/index.php?curid=56548144
Habits The call consists of an accelerating series notes, kuk kuk kuk ... which ends in a crescendo of double notes, kuk-we kuk-we. Unlike other red-billed hornbills, Southern red-billed hornbills do not raise their wings in display.