Letteratura scientifica selezionata sul tema "Passer melanurus"

The first record of Southern Grey-headed Sparrows Passer diffusus breeding in a nest in an old colony of Cape Weavers Ploceus capensis is described. This is the second record of this species breeding in any weaver nest. A pair of Cape Sparrows Passer melanurus were observed roosting in another nest in the colony. They returned to the same nest during the night after being disturbed.

On 29 November 2023, during a bird ringing session at the Vanrhynsdorp Sewage Works, we discovered a dead female Cape Sparrow Passer melanurus hanging from an old Cape Weaver Ploceus capensis breeding nest. This is the first record of a nest fatality of a Cape Sparrow in any weaver nest.

Abstract In Maloti/Drakensberg region, southern Africa, Cape Sparrow locates nests (N=108) mainly in trees (38.9%), shrubs (27.8%) and man-made structures (29.6%). Most occupied trees were exotic (31.6%), while all (27.8%) occupied shrubs were indigenous. A few nests (3.8%) were found in disused weavers’ nests. Nesting sites ranged in height from 1.5 m to 10 m above the ground; on average – 4.2 m (N=52).

Abstract There are three Passer species in Lesotho: House Sparrow P. domesticus, Cape Sparrow P. melanurus, and Grey-headed Sparrow P. diffusus. The House Sparrow is an introduced species, recorded first in Lesotho in 1954. Today, all three species are very numerous (as dominants or subdominants) in urban and rural areas in all ecozones in the country. With an increase of altitude the proportion of Cape Sparrows in relation to the other sparrow species increases, while the reverse is true for the Grey-headed Sparrow. The proportion of House Sparrows appears to be only slightly affected by altitude. In some areas, the House Sparrow may displace the Grey-headed Sparrow.

AbstractIncreased urbanisation influences the morphometric traits of various species, often resulting in urban individuals being smaller than their non-urban counterparts. Urbanisation can affect fundamental eco-evolutionary patterns and impact species’ ability to adapt to and occupy rapidly changing environments through morphological changes. We investigated the morphometric responses of two passerine species, the non-native house sparrow (Passer domesticus) and its native congener, the Cape sparrow (Passer melanurus), along gradients of spatial and temporal urbanisation in South Africa over a 52-year period. The house sparrow was significantly heavier, larger and in better condition with increasing urban infrastructure and lower urban vegetation cover, while the Cape sparrow showed opposing trends along these gradients. Temporally, the house sparrow’s body mass increased consistently over the 52-year study period, suggesting changes in morphology were concomitant with increasing urbanisation over time. This study demonstrates distinct differences in the morphological responses of the non-native house sparrow and the native Cape sparrow to increasing urban development. These morphological responses may also underpin community-level changes caused by urbanisation, enhancing the capabilities of non-native species to thrive over their native counterparts in these environments.

Four new species of Brueelia Kéler, 1936 are described and illustrated. All of them parasitize African endemic host species in the families Passeridae, Ploceidae, and Estrildidae (Passeriformes). They are: Brueelia pofadderensis sp. nov. ex Passer melanurus damarensis Reichenow, 1902 and P. m. vicinus Clancey, 1958; B. semiscalaris sp. nov. ex Granatina granatina (Linnaeus, 1758); B. sima sp. nov. ex Malimbus nitens (Gray, 1831); B. terpsichore sp. nov. ex Euplectes jacksoni (Sharpe, 1891) and E. progne delamerei (Shelley, 1903). In addition, Brueelia bicurvata (Piaget, 1880) is redescribed and reillustrated from non-type material. A summary of all published records of lice in the Brueelia complex from Africa since 1980 is provided. We also estimate the unknown diversity of African species of Brueelia based on an index of host specificity calculated for each host family independently. The unknown diversity is estimated to be over 1000 species of Brueelia from African hosts, compared to the < 50 species in this genus currently recorded from Africa.

A total of 117 bird species has been recorded in Sehlabathebe National Park, south-east Lesotho, consisting of 29 vagrants, 18 visitors and 70 breeding and probable breeding residents. For each species status was determined and abundance roughly estimated. Quantitative studies on breeding bird communities were carried out by means of the line transect method on four transects with the total length ca 30 km in the park and on two transects with the total length of ca 20 km outside the park. In the park, dominant species were represented by the Stonechat Saxicola torquata, Ayres’ Cisticola Cisticola ayresii, Yellow-rumped Widow Euplectes capensis and Wailing Cisticola Cisticola lais. Outside the park dominants were represented by Cape Weaver Ploceus capensis, Cape Sparrow Passer melanurus, Cape Canary Serinus canicollis, Common Quail Coturnix coturnix, Stonechat, Cape Bunting Emberiza capensis and Drakensberg Siskin Pseudochloroptila symonsi. Characteristic, high-altitude species in the park included Drakensberg Siskin, Mountain Pipit Anthus hoeschi, Orange-breasted Rockjumper Chaetops auriantius, Banded Martin Riparia cincta and Sentinel Rock Thrush Monticola explorator. Species such as the Laughing Dove Streptopelia senegalensis, Sicklewinged Chat Cercomela sinuata, Mountain Chat Oenanthe monticola, Thick-billed Lark Galerida magnirostris, Red-winged Starling Onychognathus morio, Alpine Swift Apus melba Cape Sparrow, Grey-headed Sparrow Passer diffusus, Red Bishop Euplectes orix and Golden Bishop Euplectes afer were absent or occurred in very low densities in the park, although they are widespread and common in the Maluti/Drakensberg grasslands (including areas neighbouring to the park). The lack of trees and shrubs for nesting, the lack of cultivated fields as feeding places and competition with related species both for food and nesting sites, may partly play a role in this regard.