| 词条 | Southern red-billed hornbill |
| 释义 |
| name = Southern red-billed hornbill | image = Southern red-billed hornbill (Tockus rufirostris) male.jpg | image_caption = Male, Chobe National Park, Botswana | image2 = Southern Red-billed Hornbill RWD.jpg | image2_caption = Female in the Kruger National Park | status = | genus = Tockus | species = rufirostris | authority = Sundevall, 1850 | synonyms = }} 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. DescriptionThe 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.[1] 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.{{citation needed|date=May 2018}} The throat is white, and the wing coverts clearly spotted.[2] HabitsThe 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.[2] Range{{Unreferenced section|date=May 2018}}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. GalleryReferences1. ^{{cite book|last1=Hockey |first1=P. A. R. |last2=Dean |first2=W. R. J. |last3=Ryan |first3=P. G. |title=Roberts Birds of Southern Africa |date=2005 |publisher=Trustees of the John Voelcker Bird Book Fund |location=Cape Town |isbn=0-620-34053-3 |pages=149–151 |edition=7th}} 2. ^1 {{cite book |last1=Sinclair |first1=Ian |last2=Ryan |first2=Peter |title=Birds of Africa south of the Sahara |date=2010 |publisher=Struik Nature |location=Cape Town |isbn=9781770076235 |pages=290–291 |edition=2nd}}
3 : Tockus|Birds of Southern Africa|Birds described in 1888 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。