| Titre : | Ostrich 90(1) - January, 2019 |
| Type de document : | Bulletin |
| Paru le : | 01/01/2019 |
Dépouillements
Article
H. Dieter Oschadleus, Auteur
Several raptor species nest on top of large weaver nests. These weaver nests are usually sited in trees, but 11.7% of Red-billed Buffalo-Weaver Bubalornis niger and 25.7% of Sociable Weaver Philetairus socius nests occur on man-made structures. [...]
Article
Johann H. van Niekerk, Auteur
This study describes the relationship between Helmeted Guineafowl Numida meleagris and invasive alien trees on livestock and maize farms south-east of Johannesburg, Gauteng province, South Africa. The dependence of the birds on alien trees affec[...]
Article
Olivier Nsengimana, Auteur ;
Matthew Becker, Auteur ;
Deo Ruhagazi, Auteur ;
Jean Ferus Niyomwungeri, Auteur
The iconic Grey Crowned Crane Balearica regulorum is facing an increase in threats to its wetland habitat and poaching for the captive trade market. This has resulted in an enduring long-term decline in population numbers, which led to the speci[...]
Article
Richard P. Reading, Auteur ;
James Bradley, Auteur ;
Peter Hancock, Auteur ;
Rebecca Garbett, Auteur ;
Moses Selebatso, Auteur ;
Glyn Maude, Auteur
Hooded Vulture Necrosyrtes monachus populations have declined dramatically in recent years, but we know little about their ecology. We radio-tagged four vultures in northern Botswana to gather data on animal movement and home-range patterns. Hoo[...]
Article
Derek Pomeroy, Auteur ;
Micheal Kibuule, Auteur ;
Dianah Nalwanga, Auteur ;
George Kaphu, Auteur ;
Michael Opige, Auteur ;
Phil Shaw, Auteur
Projected increases in Africa's human population over the next 40 years point to further, large-scale conversion of natural habitats into farmland, with far-reaching consequences for raptor species, some of which are now largely restricted to pr[...]
Article
Johann H. van Niekerk, Auteur
Fifty-five Crested Francolins, Dendroperdix sephaena sephaena, were trapped, marked, retrapped and observed from 1984 to 1988 to assess and describe gender and age criteria based on morphological measurements and plumage characteristics on the f[...]
Article
Henriëtte van der Zwan, Auteur ;
Carina Visser, Auteur ;
Rencia van der Sluis, Auteur
The genus Agapornis consists of nine small African parrot species that are globally well known as pets, but are also found in their native habitat. Illegal trapping, poaching and habitat destruction are the main threats these birds face in the w[...]
