| Titre : | Ostrich 70(2) - SEP 1999 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
M. D. Anderson, Auteur ;
A. W. A. Maritz, Auteur ;
E. Oosthuysen, Auteur
In the arid areas of southern Africa, the drowning of raptors in small reservoirs on farms is a significant cause of mortality. Records of 322 raptors of 29 species which drowned during 163 separate incidents have been collated. Whitebacked Gyps[...]
Article
P. Catry, Auteur ;
A. Araujo, Auteur ;
C. Cruz, Auteur ;
A. Pinheiro, Auteur ;
M. Pocas, Auteur ;
J. Nadum, Auteur ;
M. Armelin, Auteur ;
J. R. Pereira, Auteur
There is an increasing need for rapid habitat evaluations, in the tropics, for conservation purposes. Biodiversity is often assessed by studying relatively well known groups, such as birds. But even birds can be difficult to watch and identify i[...]
Article
A. J. van Zyl, Auteur
The breeding biology of 24 pairs of Southern African Kestrels Falco tinnunculus rupicolus was studied over two seasons in the Tarkastad District (32 degrees S), South Africa, and compared to studies of the western European Kestrel Falco tinnuncu[...]
Article
R. E. Simmons, Auteur ;
P. Barnard, Auteur ;
I. G. Jamieson, Auteur
The ability of wetland birds to rapidly find and exploit ephemeral pans is well known in arid lands, but the episodic nature of such events means that the methods employed are poorly understood. Birds may: (i) wander randomly until wetlands are [...]
Article
F. Dowsett-lemaire, Auteur
The Redbellied and Bates's Paradise Flycatchers Terpsiphone rufiventer and T. batesi are widely distributed in the rain forests of the Guineo-Congolian Region. They have similar ecological requirements, usually identical songs and in Gabon, Cong[...]
Article
H. G. Young, Auteur
The little-known Meller's Duck Anas melleri is a monochromatic species endemic to Madagascar that has been linked to the Northern Mallard A. platyrhynchos, or the African Yellowbilled Duck A. undulata. This study compared group courtship between[...]
Article
A. Roulin, Auteur
Article
P. C. Anderson, Auteur ;
O. B. Kok, Auteur ;
B. H. Erasmus, Auteur
A total of 229 Lesser Kestrels Falco naumannt shot by airport personnel as part of their bird control programme, was obtained from the Bloemfontein and Kimberley airports during the 1984/85, 1985/86 and 1986/87 austral summers Analysis of stomac[...]
Article
N. J. Collar, Auteur
Article
R. T. Watson, Auteur ;
S. Razafindramanana, Auteur ;
R. Thorstrom, Auteur ;
S. Rafanomezantsoa, Auteur
Madagascar Fish Eagles Haliaeetus vociferoides laid eggs over a 53-day period from the end of May to mid-July. The incubation period ranged from 37 to 43 days with a mean of 39.7 days and 95% confidence interval of +/- 2.3 days. Eggs hatched ove[...]
