| Titre : | Ostrich 87(1) - janvier 2, 2016 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Doug M Harebottle, Auteur ;
Les G Underhill, Auteur
Traditionally, species richness, species diversity, total count, biomass, energy consumption and the Ramsar ‘1% threshold’ have been used to assess the importance of wetlands for waterbirds. Designation of wetlands of international importance (R[...]
Article
Arjun Amar, Auteur ;
Daniël Cloete, Auteur ;
Madel Whittington, Auteur
Repeat monitoring is vital to measure biodiversity change. However, monitoring protocols may change, as survey techniques improve or different questions are asked. Such modifications may cause difficulties when examining changes in wildlife popu[...]
Article
Joris AM Bertrand, Auteur ;
Yann XC Bourgeois, Auteur ;
Christophe Thébaud, Auteur
Assessing population density is crucial for studying the ecology and evolutionary biology of species as well as for conservation purposes. Here we used point count methods to infer population density in a single-island endemic passerine bird, th[...]
Article
Julie Gane, Auteur ;
April Burt, Auteur
The Seychelles Magpie Robin Copsychus sechellarum was once one of the most threatened birds in the world, but was downgraded from Critically Endangered to Endangered after a long-term recovery programme was success- fully implemented. Comprehens[...]
Article
Steven M Goodman, Auteur ;
Stéphanie VJ Razakaratrimo, Auteur ;
Lily-Arison Réné de Roland, Auteur
We present information on the prey taken by the Bat Hawk Macheiramphus alcinus in two different areas of lowland western central Madagascar. These are the first dietary data from Madagascar for this widespread Old World species. The recovered re[...]
Article
Jasson RM John, Auteur
Article
Pirita Latja, Auteur ;
Geoffrey M Malinga, Auteur ;
Anu Valtonen, Auteur ;
Heikki Roininen, Auteur
In the face of the continuing destruction of tropical rainforests, a major challenge is to understand the consequences of these habitat changes for biodiversity and the time scale at which biodiversity can recover after such disturbances. In thi[...]
Article
Ülo Väli, Auteur ;
Urmas Sellis, Auteur
We analysed migration strategies of the Osprey Pandion haliaetus on the poorly studied Eastern European–East African flyway. Four adult birds were equipped with GPS-based satellite-transmitters or data-loggers in their breeding sites in Estonia [...]
Article
Nicholas PC Horrocks, Auteur
I report an instance of usurpation of a Crowned Lapwing Vanellus coronatus nest by a pair of African Wattled Lapwings Vanellus senegalensis. The nest, which originally contained a single Crowned Lapwing egg, eventually contained an additional th[...]
Article
Chacha Werema, Auteur ;
Kim M Howell, Auteur
Plantation forests generally support lower bird diversity than natural forests. However, in some instances the plantations have been found to provide suitable habitat for a number of bird species. In the Eastern Arc Mountains, there is limited k[...]
Article
Norbert J Cordeiro, Auteur ;
Joshua T Campbell, Auteur ;
Henry J Ndangalasi, Auteur
The breeding season diet and nesting characteristics of the Silvery-cheeked Hornbill Bycanistes brevis are poorly known. To further understand these aspects of the breeding biology of this hornbill species, 14 nests were studied in and around Am[...]
Article
Steven W Evans, Auteur ;
Elizabeth M Baker, Auteur ;
Neil E Baker, Auteur ;
Dirk Cilliers, Auteur
Two 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
Brian Reeves, Auteur ;
Andre F Boshoff, Auteur
The dietary response of African Crowned Eagles Stephanoaetus coronatus to habitat transformation was investigated. Habitat alteration around nests in the Eastern Cape, South Africa, was mapped and nests were assigned to two habitat classes. Prey[...]
Article
Joris A. M. Bertrand, Auteur ;
Yann X. C. Bourgeois, Auteur ;
Christophe Thébaud, Auteur
Assessing population density is crucial for studying the ecology and evolutionary biology of species as well as for conservation purposes. Here we used point count methods to infer population density in a single-island endemic passerine bird, th[...]
Article
Mohamed Amezian, Auteur ;
Rachid El Khamlichi, Auteur
The Egyptian Vulture Neophron percnopterus population in Morocco has undergone a marked decline since the 1980s to the point of nearing local extinction in the twenty-first century. A field study of some possible sites for Egyptian Vultures was [...]
Article
Kate J. Campbell, Auteur ;
Danielle Farah, Auteur ;
Sarah Collins, Auteur ;
Nola J. Parsons, Auteur
African Penguins Spheniscus demersus are sexually dimorphic; on average, males are larger than females but measurements overlap making sex determination difficult through observations alone. We developed a discriminant function, using bill lengt[...]
Article
Uelo Vaeli, Auteur ;
Urmas Sellis, Auteur
We analysed migration strategies of the Osprey Pandion haliaetus on the poorly studied Eastern European-East African flyway. Four adult birds were equipped with GPS-based satellite-transmitters or data-loggers in their breeding sites in Estonia [...]
