| Titre : | Ostrich 72(1-2) - MAR 2001 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
B. Kalejta-Summers, Auteur ;
M. McCarthy, Auteur ;
L. G. Underhill, Auteur
Waterbird counts at Cope Frats Sewage Treatment Works (Strandfontein) near Cope Town are analysed for three periods: 1953-58, 1961-67 and 1983-93. Information on waterbird abundance is also provided for the period 1979-81. One hundred and one sp[...]
Article
S. Ashkenazi, Auteur
Long-term (1951-1985) data on the breeding waterbird populations and habitat modifications at Cope Fiats sewage treatment works (Strandfontein) and Rondevlei Bird Sanctuary (Rondevlei) were assessed to establish the main factors affecting the br[...]
Article
T. B. Oatley, Auteur ;
L. G. Underhill, Auteur
A model-free method utilizing randomization tests was used to compare the distances moved and elapsed times between ringing and recovery. The method was applied to ring recovery data for three weavers in southern Africa, the Cope, Ploceus capens[...]
Article
F. Adriaensen, Auteur ;
M. Louette, Auteur ;
J. Stevens, Auteur ;
W. Plompen, Auteur ;
G. Verheyen, Auteur
Most of the species in the genus Foudia (Passeriformes, Ploceidae), endemic to the Malagasy region, are endangered and one is already extinct. We studied the distribution of the Forest Fody, Foudia eminentissima, algondae, on Mayotte (Comoros) d[...]
Article
B. M. Dyer, Auteur ;
L. Upfold, Auteur ;
W. Kant, Auteur ;
V. L. Ward, Auteur
Article
E. K. Urban, Auteur ;
J. S. Ash, Auteur
Article
P. Shaw, Auteur
Article
S. J. Tyler, Auteur ;
L. Tyler, Auteur
Article
G. D. Engelbrecht, Auteur
Article
R. Zilberman, Auteur ;
N. Leader, Auteur ;
B. Moav, Auteur ;
Y. Yom-tov, Auteur
Article
M. Herremans, Auteur ;
D. Herremans-Tonnoeyr, Auteur
Roadside counts of raptors in the southwestern and southern Cape during 1997/98 were compared with data from the 1950s and 1960s. Steppe Buzzard Buteo b. vulpinus, Black-shouldered Kite, Elanus caeruleus and Yellow-billed Kite, Milvus (migrans) [...]
Article
C. M. Stephens, Auteur ;
R. B. Siegel, Auteur ;
W. W. Weathers, Auteur
Article
B. Kalejta-Summers, Auteur ;
D. G. Allan, Auteur ;
T. D. Longrigg, Auteur
Waterbird 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. Jansen, Auteur ;
R. M. Little, Auteur ;
T. M. Crowe, Auteur
We studied the breeding biology of the Redwing, Francolin, Francolinus levaillantii, in the highland grasslands of Mpumalanga Province, South Africa, from 1995-1996. The breeding season is from August to March. Clutches were incubated by hens on[...]
Article
J. Gerlach, Auteur ;
S. Le Maitre, Auteur
Article
P. LLoyd, Auteur ;
R. M. Little, Auteur ;
T. M. Crowe, Auteur ;
R. E. Simmons, Auteur
This study examines whether rainfall and its effects on food availability control the timing of migratory movements and breeding activity in the Namaqua Sandgrouse, Pterocles namaqua. Namaqua Sandgrouse exhibit a pattern of partial migration bet[...]
Article
M. Herremans, Auteur ;
M. Louette, Auteur ;
J. Stevens, Auteur
Throughout their range on Madagascar and in the Comoros Frances's Sparrowhawks, Accipiter francesiae, breed from October to December, in the late dry/early wet season, resulting in young leaving the nest before or when the heavy rains start in J[...]
Article
H. H. Berry, Auteur ;
V. E. Fox, Auteur ;
P. E. Berry, Auteur
Double-banded Sandgrouse, Pterocles bicinctus, at Etosha Notional Park in Namibia exhibit a predictable and remarkably synchronized activity pattern when flying to drink at water-holes. The primary environmental cue that activates this pattern a[...]
Article
C. T. Symes, Auteur ;
C. T. Downs, Auteur ;
S. McLean, Auteur
Local movements of 374 Malachite Sunbirds, Nectarinia famosa, and 124 Gurney's Sugarbirds, Promerops gurneyi, were studied in KwaZulu-Natal over a period of 92 months. It was hypothesized that these nectarivores move in response to seasonal nect[...]
