| 词条 | White-browed sparrow-weaver | ||||
| 释义 |
| image = Plocepasser mahali -Baringo Lake, Kenya -male-8.jpg | image_caption = Male, Baringo Lake, Kenya | status = LC | status_system = IUCN3.1 | status_ref = [1] | taxon = Plocepasser mahali | authority = Smith, 1836 }} The white-browed sparrow-weaver (Plocepasser mahali) is a predominantly brown, sparrow-sized bird found throughout central and north-central southern Africa.[2] It is found in groups of two to eleven individuals consisting of one breeding pair and other non-reproductive individuals. Taxonomy and systematicsDuring his expedition to the interior of southern Africa in 1834–35, Andrew Smith collected specimens of the white-browed sparrow weaver at the Modder River, which he described in 1836, giving it the scientific name Plocepasser mahali.[2] EtymologySmith did not provide an explanation for the species epithet mahali, but is clear it is not a Latin name. Probably it is derived from the vernacular name for the bird in Setswana mogale or from the Sesotho word mohale, a brave or fierce person, which suggests the bird's name may refer to its angry scolding.[2] Vernacular namesOther common names used in English include black-billed mahali weaverbird, black-billed sparrow weaver, Kismayu sparrow-weaver, stripe-breasted sparrow-weaver, white-browed weaver bird, and white-crowned weaver bird.[3] SubspeciesThere are four recognized subspecies of the white-browed sparrow-weaver:[4]
DescriptionIt ranges from {{convert|17|to|19|cm|abbr=on}} in length and is characterized by a broad, white eyebrow stripe and white rump visible in flight. While the male white-browed sparrow-weaver sports a black bill, the female's bill is horn-colored (light gray); that of the juvenile is pinkish-brown. In Zimbabwe, the white-browed sparrow-weaver shows faint brown spotting across its white breast.[5] VoiceThe white-browed sparrow-weaver may emit either a brief chik-chick or a loud, fluid, cheoop-preeoo-chop whistle.[5] Similar speciesThe yellow-throated petronia has a pinkish brown (not black) bill, a buff (not white) eyebrow stripe, black (not pink) feet, and yellow shading at the bottom of a white throat. Additionally, the white-browed sparrow-weaver is larger than the yellow-throated petronia. Unlike the white-browed sparrow-weaver, the yellow-throated petronia may be found in broad-leaved woodland.[5] Distribution and habitatThe white-browed sparrow-weaver is found in greatest numbers in north-central southern Africa. While this species most densely populates dry regions with woodland or wooded grassland at northern South Africa, its range includes Botswana, northern and central Namibia, and western Zimbabwe. It is seen very often in South Luangwa National Park, Zambia and southern Malawi. Populations may be found as far north as Ethiopia. Populations are sedentary.[6] This species nests in colonies along thornveld and scrubby, dry riverbanks.[5] Behaviour and ecologyBreedingBreeding has been observed year round, but occurs mainly in warmer months.[6] Year round, groups of the white-browed sparrow-weaver are active and nest-building. Groups of ten to sixty inverted-U-shaped nests of dry grass appear in the outside limbs of trees, although only several are used for breeding or roosting. While breeding nests have only one entrance, roosting nests have an entrance located at each of the two nest extremities. Research has shown that, throughout a region, nests are located at the leeward side of a tree. This behavior preserves a greater number of intact nests for breeding and roosting. White-browed sparrow-weaver nests are sometimes used by other birds, such as the red-headed finch and ashy tit.[7] StatusThe white-browed sparrow-weaver is becoming more abundant, expanding its range on southern, northern, and eastern fronts.[6] References1. ^{{IUCN|id=22718690 |title=Plocepasser mahali |assessor=BirdLife International |assessor-link=BirdLife International |version=2013.2 |year=2012 |accessdate=26 November 2013}} 2. ^1 {{cite web|website= Weaver Watch – Monitoring the Weavers of the World|title= White-browed Sparrow-Weaver Plocepasser mahali|url= http://weavers.adu.org.za/sp.php?spp=780|accessdate= 2017-05-17}} 3. ^{{cite web|website= Avibase|title= Mahaliwever|url= https://avibase.bsc-eoc.org/species.jsp?avibaseid=94C71DF619A51A4F|accessdate= 2017-04-17}} 4. ^IOC World Bird List 5. ^1 2 3 {{cite book | last = Sinclair | first = Ian | last2 = Hockey | first2 = Phil | last3 = Tarboton | first3 = Warwick | title = Princeton Field Guides: Birds of Southern Africa | publisher = Princeton University Press | year = 2002 | location = Princeton, New Jersey | pages = 396–397 | isbn = 0-691-09682-1 }} 6. ^1 2 3 {{cite book | last = Harrison | first = J. A. | last2 = Allan | first2 = D. G. | last3 = Parker | first3 = V. | last4 = Brown | first4 = C. J. | title = The Atlas of South African Birds | publisher = BirdLife South Africa | year = 1997 | pages = 532 | url = http://web.uct.ac.za/depts/stats/adu/pdf/799.pdf |format=PDF }} 7. ^{{cite journal | last = Ferguson | first = J. W. H. |author2=Siegfreid, W. R. | title = Environmental Factors Influencing Nest-Site Preference in White-Browed Sparrow-Weavers (Plocepasser Mahali) | journal = The Condor | volume = 91 | issue = 1 | pages = 100–107 | date = January–February 1989 | url = http://sora.unm.edu/sites/default/files/journals/condor/v091n01/p0100-p0107.pdf |format=PDF| doi =10.2307/1368152 | accessdate = 1 March 2007 | jstor = 1368152 }} External links{{Commons|Plocepasser mahali}}
4 : Plocepasser|Birds of Sub-Saharan Africa|Birds described in 1836|Birds of East Africa |
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