| Titre : | Ostrich 71(1-2) - MAR 2000 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
J. H. Wanink, Auteur ;
K. Goudswaard, Auteur
In spite of an increase in Lakeflies emerging from Lake Victoria, these periodically swarming insects remained an erratic food source for birds. However, even the relatively poor south-eastern shores were exploited by some Palearctic warblers on[...]
Article
T. B. Oatley, Auteur
A total of 1 457 recoveries and controls of European Swallows Hirundo rustica in the South African Bird Ringing Unit data bank were analysed to provide an update of the apparent origins and dispersion of migrant European Swallows in southern Afr[...]
Article
L. Bennun, Auteur ;
L. Fishpool, Auteur
BirdLife International works to conserve the world's birds at the levels of species, sites and habitats. The Important Bird Areas (IBA) programme is a process of setting site-based priorities for birds based on information about species' distrib[...]
Article
M. D. Anderson, Auteur
The semi-arid Northern Cape is the largest and most sparsely populated province in South Africa. One of the main economic activities is sheep farming, and the properties are generally very large (>5 000 ha). A heterogeneous environment results i[...]
Article
V. Salewski, Auteur
Habitat choice, microhabitat and foraging behaviour of the palaearctic Pied Flycatcher and Willow Warbler are described in their West-African wintering areas and are compared with those of resident species. The migrants were more flexible in hab[...]
Article
B. Van Den Brink, Auteur ;
R. G. Bijlsma, Auteur ;
T. M. Van der Have, Auteur
The rate of moult of European Swallows spending the non-breeding season in Botswana was studied during December-January of 1992/93, 1993/94 and 1994/95 to investigate the effects of variability in rainfall and roosting habitat availability. In J[...]
Article
N. Coulthard, Auteur ;
G. Allport, Auteur
Article
A. Msimanga, Auteur
The Ndebele people of western Zimbabwe uphold some beliefs and practices relating to birds and these are either shared with other ethnic groups or unique to them. Some areas of interaction include the naming of birds, taboos. folk stories and so[...]
Article
L. Borghesio, Auteur ;
R. Massa, Auteur
Prince Ruspoli's Turaco is an Ethiopian endemic, distributed in a small region at the southern border of the Abyssinian Plateau. Owing to the difficulty of visiting its secluded range, little informations available on its current conservation st[...]
Article
N. D. Burgess, Auteur ;
C. O. F. Mlingwa, Auteur
In this paper we assess the evidence for altitudinal movements of forest birds from thr montane forests of the Eastern Are mountains of East Africa to nearby lowland forest patches. For 34 montane species, including all the Eastern Are endemics [...]
Article
M. O. Rakotonomenjanahary, Auteur ;
A. F. A. Hawkins, Auteur
Madagascar does not have a rich avifauna, with 277 species recorded to date. However, the level of endemism is very high: 110 endemic species,
Article
M. Virani, Auteur
A radio-telemetric study of the endangered Sokoke Scops Owl Otus ireneae was conducted between July and December 1993. The aims were to determine the species' home range and movement patterns with respect to time and moon phases. Information gat[...]
Article
W. C. Mullie, Auteur
Three traditional methods of capturing Red-billed Quelea Quelea quelea practised by different ethnic groups, were studied in the Lake Chad Basin in Chad and Cameroon: capture of birds by triangular hand-held nets by Hadjerai' piegeurs (trappers)[...]
Article
R. G. Selman, Auteur ;
M. L. Hunter, Auteur ;
M. R. Perrin, Auteur
We have started the first in-depth study into the behaviour of Ruppell's Parrot in the wild. Here we provide the initial results with information on its breeding biology, diet and use of natural and artificial water pools in northern Namibia. A [...]
Article
A. T. Nigussie, Auteur
The Birdlife International Partner in Ethiopia is the Ethiopian Wildlife and Natural History Society (EWNHS), established in 1966. The aims of the society are mentioned and projects run by the EWNHS, within the framework of the 'Conservation for[...]
Article
A. T. Nigussie, Auteur ;
Y. Dellelegn, Auteur
The history of the Ethiopian Wildlife and Natural History Society (EWNHS) is presented and the background to involvement with BirdLife International and incorporation in the African network as a BirdLife Partner is described. The IBA intitiative[...]
Article
V. Venuto, Auteur ;
L. Bottoni, Auteur ;
R. Massa, Auteur
We report here on a bioacoustical and contextual analysis of Orange-bellied Parrot vocalisations recorded in Tarangire National Park, Tanzania. We analysed a total of 154 vocalizations of which 110 were simple calls pertaining to five different [...]
Article
P. J. Mundy, Auteur ;
J. T. Couto, Auteur
Lake Chivero, in the Robert McIlwaine Recreational Park west of Harare, is the capital city's main reservoir of drinking water. It has been the subject of five surveys for pesticides and/or heavy metals in the period 1974-1995. The (geometric) a[...]
Article
R. D. Lily-Arison, Auteur
Frances's Sparrowhawks Accipiter francesii were studied during the breeding seasons 1994 and 1995 on Masoala Peninsula of northeastern Madagascar. Breeding coincides with the dry season, nest building in October, egg laying in November, hatching[...]
Article
C. McKay, Auteur ;
N. Coulthard, Auteur
Surveys of North-west Cameroon revealed a high degree of clearance of montane forest, threatening the survival of the wildlife endemic to this type of forest. The Kilum and Ijim forests, in which Birdlife initiated conservation work ten years ag[...]
Article
M. Rands, Auteur
The International Council for Bird Preservation (ICBP) - the forerunner of BirdLife International - was founded in 1922 by a small and dedicated group of individuals. It has grown into a world-wide network of Partner organisations and individual[...]
Article
O. A. Akinsola, Auteur ;
A. U. Ezealor, Auteur ;
G. Polet, Auteur
The ornithological importance of the Hadejia-Nguru wetlands at both national and international levels is well known. Current efforts at conserving the avifauna of the wetlands started with the establishment of the Hadejia-Nguru Wetlands Conserva[...]
Article
F. Adriaensen, Auteur ;
M. Louette, Auteur ;
J. Stevens, Auteur ;
W. Plompen, Auteur ;
G. Verheyen, Auteur
Once, every group of islands in the Malagasy region had its own species of Foudia (Passeriformes, Ploceidae), but in recent years things have changed profoundly. Except for the widespread Madagascar Fody F. madagascariences, most of the species [...]
Article
C. Magin, Auteur
BirdLife International's Important Bird Areas programme (IBA) was launched in Morocco in 1995 by a steering committee comprised of three national NGO's, representatives from the Ministries of Agriculture and Environment, the University of Montpe[...]
Article
A. M. Rijke, Auteur ;
W. A. Jesser, Auteur ;
S. W. Evans, Auteur ;
H. Bouwman, Auteur
The Blue Swallow is an endangered species in southern Africa and is probably the most endangered passerine. It is restricted to escarpments with grasslands above 1 000 m where mists are frequent. It appears to forage on the wing even in thick mi[...]
Article
P. Scholte, Auteur ;
S. De Kort, Auteur ;
M. van Weerd, Auteur
The Logone floodplain in the sahelo-Sudanian zone of Cameroon used to be a highly productive ecosystem. Perennial pastures and fish played a crucial role for fishermen, pastoralists and wildlife. The construction of an upstream dam reduced inund[...]
Article
Y. Ntiamoa-baidu, Auteur
Article
Round table discussion on African Ornithological Societies - The West African Ornithological Society
G. Morel, Auteur
This meeting was arranged by the West African Ornithological Society (WAOS), taking advantage of the presence at the 9th. PAOC of many of its members, to exchange ideas with other African Ornithological Societies and those of its surrounding isl[...]
Article
A. Janoo, Auteur
The phylogenetic positions of the dodo and the solitaire are studied in a cladistic framework, taking into consideration the columbiform assemblage and using outgroup comparison taxa from Gruiformes, Charadriiformes, Ciconiiformes and the Ardeid[...]
Article
S. Kanyamibwa, Auteur
Ten IBA sites in Rwanda had been identified when war broke out. Site descriptions based on published data and personal records were modelled on the standard African IBA format. Fit ld surveys are now needed as the status of these sites has surel[...]
Article
L. B. Davenport, Auteur ;
E. K. Urban, Auteur
Time budgets for six pairs of captive Wattled Cranes were recorded in the years 1989-1991 at St. Catherine's island, Georgia, U.S.A., using instantaneous sampling at 30 s intervals. Data were obtained to cover one complete day, from earliest lig[...]
Article
J. Arinaitwe, Auteur ;
A. Byaruhanga, Auteur ;
P. Mafabi, Auteur
Article
S. W. Evans, Auteur ;
H. Bouwman, Auteur
DDT has, since 1946 been used in the intradomicilliary control of malaria in northern KwaZulu-Natal. The Pied Kingfisher was selected as representative for organisms in relatively high trophic levels. Blood was obtained from Pied Kingfishers at [...]
Article
S. M. Goodman, Auteur
A single humerus of a ground-roller (Brachypteracias, Family Brachypteraciidae), a family endemic to Madagascar, found at a subfossil site in the southwest (Ampoza) of presumed Holocene age and outside the modern geographic range of this genus, [...]
Article
L. Bennun, Auteur ;
P. Njoroge, Auteur
The process of defining Important Bird Areas in Kenya has been underway since January 1995, with financial support from the Royal Society for the Protection of Birds. Literature review has proceeded in parallel with field surveys, which are stil[...]
Article
P. M. B. Kasoma, Auteur
Observations of activities were carried out over 12 h periods on the Goliath Heron, Grey Heron and Great White Egret along the shores of Lake Edward and Kazinga Channel. Behaviour was classified into three major categories: foraging, leafing and[...]
Article
H. D. Oschadleus, Auteur ;
G. D. Underhill, Auteur ;
L. G. Underhill, Auteur
Timing of breeding and moult is analysed in the Masked Weaver Ploceus velatus. It is common throughout southern Africa, which is largely a summer rainfall area. This species expanded its range into the Western Cape, a winter rainfall region, in [...]
Article
R. A. Cheke, Auteur ;
J. F. Walsh, Auteur
Male Standard-wing Nightjars Macrodipteryx longipennis were observed interacting on the ground and in the air at "display arenas" in Togo. Males walked towards each other in discrete bursts of activity, taking it in turns to move, whilst apparen[...]
Article
H. Tushabe, Auteur ;
D. Pomeroy, Auteur ;
J. Reynolds, Auteur
In Uganda, lack of adequate data on species' distributions poses a problem in laying strategies for conservation planning. Some of the data that exist are old and are therefore of uncertain value, given the pace of environmental changes. To over[...]
Article
D. H. L. Thomas, Auteur ;
S. Anders, Auteur ;
N. J. Penn, Auteur
BirdLife International has worked for ten years in Cameroon's North-West Province to assist the local people and government of Cameroon in achieving the conservation and sustainable management of the last significant remnant of a unique montane [...]
Article
C. M. Gichuki, Auteur
In Africa today, many natural ecosystems are threatened with destruction. primarily because of unsustainable exploitation and negative impacts of development activities. Wetlands are prime targets of exploitation because they contain the basic r[...]
Article
S. W. Evans, Auteur ;
H. Bouwman, Auteur
Due to the locality of the Blue Swallow Natural Heritage Site it appears that the birds have no alternative but to forage in the mist. The birds cease foraging as soon as it starts raining. Eight eggs failed to hatch after a week in which rainfa[...]
Article
R. T. Watson, Auteur ;
J. Berkelman, Auteur ;
R. Rabarisoa, Auteur ;
R. Thorstrom, Auteur ;
C. R. B. Watson, Auteur
Recent surveys indicate the Madagascar Fish-Eagle Haliaectus vociferoides population is about 100 breeding pairs; the species is considered among the most endangered birds of prey worldwide. This paper reports one of several studies to determine[...]
Article
C. M. Eising, Auteur ;
K. B. Blaakmeer, Auteur ;
J. Komdeur, Auteur
Nowadays, many natural populations have to face up to problems such as genetic drift and 'forced' inbreeding as a result of reduced numbers and population isolation. This is thought to have a major effect on their survival. Research on the isola[...]
Article
H. S. Thompson, Auteur ;
R. Fotso, Auteur
In this paper, we describe the threats faced by Picathartes populations around two urban centres in Sierra Leone and Cameroon and outline some of the possible lines of conservation action. These populations are small and on the brink of local ex[...]
Article
Controlling the flood in the Senegal Delta: do waterfowl populations adapt to their new environment?
Patrick Triplet, Auteur ;
P. Yesou, Auteur
The delta of the Senegal river (320 000 ha) has been gradually dammed, mostly during the 1970-80s. From 1986, the Diama dam has stopped any backflow of salt water from the sea into most of the delta, and retains a large volume of fresh water whi[...]
Article
M. E. D. Nhlane, Auteur
The breeding biology of the House Sparrow Passer domesticus was studied from 1989-1990. The birds bred throughout the year at this site. Modal clutch size varied from three to four eggs, with a mean clutch of 3.9. The average incubation period w[...]
Article
L. A. Bennun, Auteur ;
P. Njoroge, Auteur ;
D. Pomeroy, Auteur
The value of Red Data books and lists is well established; there has been much recent work on improving the criteria for listing species of conservation concern. So far these have been applied mainly at the global level. Regional lists can be us[...]
Article
N. Burgess, Auteur ;
H. de Klerk, Auteur ;
J. Fjeldsa, Auteur ;
T. Crowe, Auteur ;
R. Rahbek, Auteur
Databases compiled for forest birds and forest mammals in the Afrotropies were tested for congruence of overall patterns and hotspots of species richness and endemism. We also looked at how well a near-minimum set of priority areas for one taxon[...]
Article
C. Dranzoa, Auteur
This paper gives a summary of the effect of selective logging upon forest bird communities. Some differences may exist from one region to another due to environmental as well as ecological factors. However, the general responses of bird communit[...]
Article
O. Nasirwa, Auteur ;
L. A. Bennun, Auteur
In Kenya annual waterbird counts have been carried out consistently since 1991. The counts are a collaborative effort between the National Museums of Kenya, Kenya Wildlife Service and the Kenya Wetlands Working Group. Their aim has been to train[...]
Article
N. Gichuki, Auteur
This study investigated the effects of breeding on the foraging behaviour and diet of Grey Crowned Cranes Balearica regulorum in the Kitale area, western Kenya. During the study period (July 1994 to June 1996). 86 pairs successfully bred in 290 [...]
Article
L. Lens, Auteur ;
M. Muchai, Auteur ;
L. A. Bennun, Auteur ;
L. Duchateau, Auteur
We studied the distribution and habitat use of Sharpe's Longclaw, Macronyx sharpei, a Kenyan montane grassland endemic, in a fragmented agricultural landscape at two spatial scales. Monthly counts in a fixed number of plots selected in contrasti[...]
Article
B. Larison, Auteur ;
T. B. Smith, Auteur ;
R. Fotso, Auteur ;
D. McNiven, Auteur
Endemism among birds is widespread in the montane forests of western Cameroon and the Gulf of Guinea. The region includes some of the rarest and most threatened species in Africa. We conducted avian surveys of four previously unsurveyed montane [...]
Article
E. Waiyaki, Auteur ;
L. A. Bennun, Auteur
Article
P. Mafabi, Auteur
Wetlands in Uganda provide important habitats for birds including several endemic species. With the ever increasing pressure to convert wetlands to agricultural lands, several species have lost their habitats. while others have become pests due [...]
Article
P. Njoroge, Auteur ;
L. A. Bennun, Auteur
Hinde's Babbler is a restricted-range species endemic to Central Kenya. In recent years it appears to have suffered a marked reduction of population within its range. Using active searching and playback of vocalisations, we assessed the species'[...]
Article
M. Waltert, Auteur
The Bossematie Forest, Eastern Ivory Coast, has repeatedly been logged but is now subject to rehabilitation carried out by the Ivorian SODEFOR (Societe de developpement des forets) in co-operation with the German GTZ (Gesellschaft fur Technische[...]
Article
Y. Ntiamoa-baidu, Auteur ;
E. H. Owusu, Auteur ;
S. Asamoah, Auteur ;
K. Owusu-Boateng, Auteur
Forest reserves within the Ghanaian rain forest have been classified into categories (Condition I-VI) on the basis of their botanical importance and status of the vegetation. We present data on the distribution and abundance of avifauna of 28 Co[...]
Article
AJFK Craig, Auteur
In southern African six Lamprotornis species occur in savanna woodland. Locally up to five species may be sympatric, dependent on similar food sources and sharing roost sites. All are obligate tree-hole nesters. Morphological differences concern[...]
Article
C. O. F. Mlingwa, Auteur
The breeding and moult phenology of an avian community in the Pugu Hills in coastal Tanzania was investigated in a ringing study carried out during January to March 1993, June 1994 to May 1995, and October 1995. A total of 74 bird species was ex[...]
Article
J. B. Adjakpa, Auteur
Little is known about the biology of Abdim's Stork Ciconia abdimii, in Benin. I studied the nesting of this intra-African migrant in the wet season of 1996. Breeding pairs arrived at the end of March 1996. Seven nest sites were found, involving [...]
Article
K. H. Y. Beibro, Auteur ;
H. Ellenberg, Auteur
The Bossematie forest, eastern Cote d'Ivoire (3 degrees 35'-3 degrees 20' longitude west and 6 degrees 35'-6 degrees 20' latitude north), has been heavily exploited in the past and is now being rehabilitated by the SODEFOR (Societe de Developpem[...]
Article
Article
T. Dodman, Auteur ;
V. Katanekwa, Auteur ;
D. Aspinall, Auteur ;
R. Stjernstedt, Auteur
A survey of the Black-cheeked Lovebird Agapornis nigrigenis in 1993 resulted in much new information About 10 000 live in mopane Colophospermum mopane woodland in south-west Zambia. They are localised with a high dependence on mopane woodland wi[...]
Article
E. Sande, Auteur
Semuliki National Park is a rich lowland forest in terms of biodiversity. The bird species list currently stands at 428, of which 31 species occur nowhere else in East Africa. Although the park was severely encroached for agricultural activities[...]
Article
M. Louette, Auteur
Plumage characteristics were superficially taken into account by Wattel (1973) for his division of the genus Accipiter; Savalli (1995) formulated hypotheses to explain plumage colouration evolution in birds in general. I examine here variation o[...]
Article
W. J. Bock, Auteur
Avian systematics is not only part of the science of ornithology, but serves heuristically as a foundation for many other analyses in ornithology. Systematics can be divided roughly into two major areas, namely species-level analyses and suprasp[...]
