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Auteur D. G. Allan |
Documents disponibles écrits par cet auteur (4)
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Article
D. G. Allan, Auteur ; G. B. Davies, AuteurNesting House Crows Corvus splendens were studied in the suburb of Merewent, Durban, South Africa, during the summer breeding season of 1999-2000. The c. 1 km(2) study area supported 52-62 pairs. Breeding dispersal was clumped, suggesting a leve[...]![]()
Article
R. K. Brooke, Auteur ; D. G. Allan, Auteur ; J. Cooper, Auteur ; D. P. Cyrus, Auteur ; W. R. J. Dean, Auteur ; B. M. Dyer, Auteur ; A. P. Martin, Auteur ; R. H. Taylor, AuteurThe Greyheaded Gull Larus cirrocephalus occurs throughout southern Africa, both coastally and inland, and has bred at one time or another at 67 known localities since the 1860s. Most of these sites have been occupied by small numbers of birds, e[...]![]()
Article
B. Kalejta-Summers, Auteur ; D. G. Allan, Auteur ; T. D. Longrigg, AuteurWaterbird counts at Rietvlei, a freshwater wetland in the Western Cape, were analysed for four periods: 1950-56, 1961-67, 1980-85 and 1992-97. Ninety-eight species of waterbirds were recorded during these counts. Palaearctic migrants predominate[...]![]()
Article
R. E. Simmons, Auteur ; D. G. Allan, AuteurLike many other southern African rivers, the avifaunal richness and abundance of the Orange River, southern Africa's longest, remains virtually unknown. Given that the Orange River runs through hyper-arid regions in its lower reaches, its linear[...]



