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Auteur Steven W Evans |
Documents disponibles écrits par cet auteur (5)
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Article
Steven W Evans, AuteurThe Northern Black Korhaan Afrotis afraoides and the Southern Black Korhaan Afrotis afra were previously considered conspecific, but were subsequently separated based on habitat, plumage, displays and vocalisations of the males and genetic diffe[...]![]()
Article
Steven W Evans, AuteurThe Agulhas Long-billed Lark Certhilauda brevirostris is a South African endemic and is restricted to the fynbos habitat of the Agulhas Plain in the southwestern corner of South Africa. The 1990, 2014, and 2018 land use land cover (LULC) databas[...]![]()
Article
Steven W Evans, Auteur ; Ara Monadjem, Auteur ; Lizanne Roxburgh, Auteur ; Andrew E McKechnie, Auteur ; Ellizabeth M Baker, Auteur ; Robert B Kizungu, Auteur ; Ian T Little, Auteur ; Fadzai Matsvimbo, Auteur ; Ronald K Mulwa, Auteur ; Daniel Mwizabi, Auteur ; Dianah Nalwanga, Auteur ; Kariuki Ndang'ang'a, Auteur ; Leigh Combrink, AuteurThe global Blue Swallow Hirundo atrocaerulea was classified as Vulnerable in 2010 on account of its small and rapidly declining population estimated at less than 1 500 pairs. We undertook this study to gain a better understanding of the current [...]![]()
Article
Steven W Evans, Auteur ; Elizabeth M Baker, Auteur ; Neil E Baker, Auteur ; Dirk Cilliers, AuteurTwo surveys of Blue Swallows were conducted in the southern Tanzanian highland grasslands in order to determine the habitat preferences and estimate the size of this subpopulation. During the 2008/09 and 2012 surveys, a total distance of 3 635 k[...]![]()
Article
Lisa N Barrow, Auteur ; Desiré L Dalton, Auteur ; Antoinette Kotze, Auteur ; Steven W Evans, AuteurThe African saw-wings (genus Psalidoprocne) are a group of swallows endemic to sub-Saharan Africa. Although currently described as five species with several subspecies, the taxonomy of the saw-wings is unclear. We sequenced two mitochondrial gen[...]



