EIGHTEENTH RINGING REPORT FOR SOUTHERN AFRICA

Vernon, C. J. 1976. Eighteenth ringing report for southern Africa. Ostrich 47:89-94. A report on ringing activities in southern Africa from July 1974 to June 1975 is presented. A total of 47 777 birds of 475 species were ringed. This information is examined according to distribution of ringers, species ringed and recovery rates.     

A RINGING STATION IN EGYPT

Trapping and ringing of non–resident birds in Egypt in 1949 and 1950 are recorded and details of re–trapping after migration and of one foreign recovery are given.     

TWENTY-FIRST RINGING REPORT FOR SOUTHERN AFRICA

Morant, P. D. 1980. Twenty-first ringing report for southern Africa. Ostrich 51:204-214. A report on ringing activities for southern Africa from July 1977 to June 1978 is presented. A total of 16 830 birds of 346 species was ringed. This is a continuation of the trend established by emphasis being placed on project-orientated rather than indiscriminate ringing.     

PROGRESS REPORT: BIRD RINGING

Craig, A.J.F.K. &; Hulley, P.E. 1994. Sunbird movements: a review, with possible models. Ostrich 65: 106–110.

Based on current fieldwork, we propose four possible models to explain the winter influx of sunbirds which we have observed: the birds may be (1) “winter residents”, which move annually to a wintering area and remain there; (2) “shoppers”, which periodically investigate feeding areas within their home range and feed opportunistically where nectar is most abundant; (3) “tourists”, which successively visit a series of sites on a regular itinerary; (4) “nomads”, which move unpredictably to new areas whenever food supplies decline. and have no home base. Current data on sunbird movements are reviewed, and in a few cases the winter resident model is unlikely, but generally it is not yet possible to eliminate any of the hypotheses. Moult cycles based on both field and museum studies may provide additional information, as movements are unlikely while active wing-moult is in progress; some species show interrupted wing-moult, which may be associated with long-distance flights.     

NINETEENTH RINGING REPORT FOR SOUTHERN AFRICA

Vernon, C. J. 1977. Nineteenth ringing report for southern Africa. Ostrich 48:106-109. A report on ringing activities for southern Africa from July 1975 to June 1976 is presented. A total of 36 016 birds of 419 species was ringed. The trends follow the general decline in ringing activities sinze a peak in 1970/71.