| Titre : | Ostrich 75(4) - DEC 2004 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
H. D. Oschadleus, Auteur
The biometric and primary moult data housed at the South African Bird Ringing Unit (SAFRING) were analysed for the Sociable Weaver Philetairus socius. The average body mass and wing length was 27.9g (SD = 2.2) and 74.1mm (SD = 2.5), respectively[...]
Article
T. M. Crowe, Auteur ;
R. M. Little, Auteur
Article
S. J. Tyler, Auteur
Article
R. M. Little, Auteur ;
T. M. Crowe, Auteur
One of the key findings of the Grey-winged Francolin Research Project conducted on the Stormberg Plateau, Eastern Cape Province, South Africa during 1988-1992 was that predation, particularly by small mammals on incubating female Greywinged Fran[...]
Article
A. L. Walker, Auteur ;
R. C. K. Bowie, Auteur ;
C. S. Ratcliffe, Auteur ;
T. M. Crowe, Auteur
This study investigates the possibility of hybridisation between introduced domestic Helmeted Guineafowl Numida meleagris, derived from the West African subspecies N. m. galeata, and South African guineafowl, N. m. coronata. There is putative mo[...]
Article
R. Covas, Auteur ;
O. Huyser, Auteur ;
C. Doutrelant, Auteur
Article
D. Naiwanga, Auteur ;
P. LLoyd, Auteur ;
M. A. du Plessis, Auteur ;
T. E. Martin, Auteur
Choice of nest site has important consequences for nest survival. We examined nest-site characteristics relative to nest success in Karoo Prinias breeding in coastal dwarf shrubland, where high nest predation is the main cause of nest failure. I[...]
Article
Article
T. Osborne, Auteur
Article
Article
Article
R. E. Simmons, Auteur ;
P. Barnard, Auteur ;
W. R. J. Dean, Auteur ;
G. F. Midgley, Auteur ;
W. Thuiller, Auteur ;
G. Hughes, Auteur
Global climate warming, now conclusively linked to anthropogenically-increased CO(2) levels in the earth's atmosphere, has already had impacts on the earth's biodiversity and is predicted to threaten more than 1 million species with extinction b[...]
Article
G. Mcculloch, Auteur ;
K. Irvine, Auteur
Aerial surveys of flamingo breeding colonies were conducted during three consecutive breeding seasons between October 1998 and July 2001, in the south of Sua Pan, Makgadikgadi, Botswana. Rainfall during the rainy seasons of 1998-1999, 1999-2000 [...]
Article
Article
P. G. Ryan, Auteur ;
D. Wright, Auteur ;
G. Oatley, Auteur ;
J. Wakeling, Auteur ;
C. Cohen, Auteur ;
T. L. Nowell, Auteur ;
R. C. K. Bowie, Auteur ;
V. Ward, Auteur ;
T. M. Crowe, Auteur
The taxonomy of, and phylogenetic relationships among, African canaries typically assigned to the genus Serinus sensu lato (including the putative genera Alario, Pseudochloroptila, Serinops, Ochrospiza, Dendrospiza and Crithagra) were investigat[...]
Article
P. LLoyd, Auteur
I examined the nesting habits and success of 11 co-existing species in an arid, sub-tropical habitat in South Africa. Nesting success ranged from 3.5% to 75.4% among species, with predation by mammals and snakes accounting for 94% of nest losses[...]
Article
E. Herrmann, Auteur ;
M. D. Anderson, Auteur ;
M. Seaman, Auteur
Bi-monthly counts of waterbirds were made between March and September 2003 at an ephemeral pan in the Northern Cape Province following the first substantial inundation since 1988. Bi-annual counts between 1991 and 2003 indicated that the pan inf[...]
Article
O. Krüger, Auteur
I examined the breeding biology of the Cape Bulbul Pycnonotus capensis at a study site in Port Elizabeth for a comparison with the results obtained by Richard Liversidge from a study made 40 years ago. There were no differences in methods, so re[...]
Article
D. Nalwanga, Auteur ;
P. LLoyd, Auteur ;
M. A. du Plessis, Auteur ;
T. E. Martin, Auteur
Nest-site selection may vary adaptively among co-existing species as a result of competitive interactions among the species or in response to density-dependent nest predation. We examined nest-site characteristics and degree of partitioning amon[...]
Article
J. M. Bates, Auteur ;
R. C. K. Bowie, Auteur ;
D. E. Willard, Auteur ;
G. Voelker, Auteur ;
C. Kahindo, Auteur
Article
C. J. Vernon, Auteur
From 1983 to 2004 the breeding population of African Black Oystercatchers along the East London coast has more than trebled. The population increase is probably due to immigration as local breeding success is low. There are three classes of bird[...]
Article
Article
M. Herremans, Auteur
Results are presented from point-counts at six sites in the Kalahari in Botswana. Counts were repeated three times: during a dry season following good rains (1991), during the next wet season when rains were far below average, and the following [...]
Article
E. Herrmann, Auteur
