Search
Search results for
We found
16 results for you
-
Guidelines for the design and management of artificial raptor perches and nest-tree stands on forestry estates in South Africa
Item type: Journal Article • Journal: The Southern African Forestry Journal • Authors: G. Malan --- Department of Nature Conservation Pretoria Technikon, A.vN. Marais --- Biological Diversity Services,The aim of this paper is to provide timber growers with silvicultural guidelines for the establishment of raptor perches and nest stands on forestry estates. Rodents do extensive damage to young saplings and as an ecologically friendly alternative to rodenticides,... -
Responses of the Serengeti avifauna to long-term change in the environment
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Anthony RE Sinclair --- Beaty Biodiversity Research Centre, Canada Ally Nkwabi --- Serengeti Biodiversity Program, Tanzania Simon AR Mduma --- Beaty Biodiversity Research Centre, Canada Flora Magige --- Department of Zoology and Wildlife Conservation, TanzaniaIn this paper we examine how climate change interacts with other disturbances to alter the functioning of a tropical ecosystem, the Serengeti in Tanzania. Tropical Africa has increasing temperatures and changes in rainfall. Long-term data have shown how the avifauna... -
Causes of admissions to a raptor rehabilitation centre in KwaZulu-Natal, South Africa
Item type: Journal Article • Journal: African Zoology • Authors: Lindy J. Thompson --- University of KwaZulu-Natal, South Africa Ben Hoffman --- Raptor Rescue, South Africa Mark Brown --- University of KwaZulu-Natal, South AfricaWith many species of southern African raptors becoming increasingly threatened, records from rehabilitation centres can give an indication of the threats faced by birds of prey in particular areas and to particular species. Thus, admissions records from a raptor rehabilitation... -
Status of birds of prey in Guinea-Bissau: first assessment based on road surveys
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Mohamed Henriques --- Marine and Environmental Sciences Centre (MARE), Portugal Miguel Lecoq --- BirdLife International, Senegal Hamilton Monteiro --- Coastal Planning Office, Guinea-Bissau Aissa Regalla --- Instituto da Biodiversidade e Áreas Protegidas (IBAP), Guinea-Bissau José P Granadeiro --- Centro de estudos do ambiente e do mar (CESAM), Departamento de Biologia Animal, Faculdade de Ciências, Portugal Paulo Catry --- Marine and Environmental Sciences Centre (MARE), PortugalSeveral studies have reported marked declines in populations of birds of prey across the African continent, including West Africa. However, there are still regions of which virtually nothing is known, as is the case for Guinea-Bissau. Because birds of prey... -
Densities and population sizes of raptors in Uganda’s conservation areas
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Derek Pomeroy --- Department of Zoology, Uganda Micheal Kibuule --- Department of Zoology, Uganda Dianah Nalwanga --- NatureUganda, Uganda George Kaphu --- Uganda Wildlife Authority, Uganda Michael Opige --- NatureUganda, Uganda Phil Shaw --- School of Biology, UKProjected increases in Africa's human population over the next 40 years point to further, large-scale conversion of natural habitats into farmland, with far-reaching consequences for raptor species, some of which are now largely restricted to protected areas (PAs). To assess... -
Raptors breeding on weaver nests in trees and on man-made structures
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: H Dieter Oschadleus --- School of Life Sciences, South AfricaSeveral raptor species nest on top of large weaver nests. These weaver nests are usually sited in trees, but 11.7% of Red-billed Buffalo-Weaver Bubalornis niger and 25.7% of Sociable Weaver Philetairus socius nests occur on man-made structures. In an extensive... -
Implications of geographical range changes and resultant sympatry for three Accipiter hawks on the Cape Peninsula, South Africa
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robin M Little --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South Africa Rene A Navarro --- FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, South AfricaSome invasive species are known to compete with and even displace indigenous species. Two Accipiter species historically indigenous to eastern South Africa have colonised the Cape Peninsula in the south-west of the country and have become sympatric with a third... -
Cinereous Vulture Aegypius monachus movements between Europe and Africa show a pattern across the Strait of Gibraltar
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Juan Ramírez --- Malaga University, Spain Javier Elorriaga --- , Spain Andrés de la Cruz --- Spanish Institute of Oceanography (IEO), Spanish National Research Council (CSIC), SpainThe biology of the Cinereous Vulture Aegypius monachus is well known across its breeding range, and the species’ dispersal and movements throughout Europe are widely recorded. However, the ecology of this vulture south of the Mediterranean Sea has been overlooked,... -
Reproduction of the Western Marsh Harrier Circus aeruginosus at the El Maleh Dam reservoir in north-western Morocco
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Abdeslam Rihane --- , Morocco Abdelmottalib Nahli --- Hassan II Université Casablanca, Morocco Rhimou El Hamoumi --- Hassan II Université Casablanca, Morocco Mohamed Chlaida --- Hassan II Université Casablanca, MoroccoThe reproduction of the Western Marsh Harrier Circus aeruginosus in submerged and dried up thickets of French tamarisk Tamarix gallica at El Maleh Dam reservoir, Benslimane Province, Morocco, was studied through monitoring nests in three successive years (2017–2019). Systematic field... -
Spatial use of non-breeding sites by adult GPS-tracked Ospreys Pandion haliaetus from Germany
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Bernd-Ulrich Meyburg --- , Germany Daniel Holte --- , GermanyRecent analyses of telemetry data on Ospreys Pandion haliaetus predominantly address migratory movements, whereas studies focusing on spatial use are rare, especially concerning the African non-breeding areas. We analysed GPS telemetry data of 15 adult Ospreys breeding in northeast Germany,... -
Lack of evasive behaviour by a Martial Eagle Polemaetus bellicosus on impact with a turbine blade at a South African wind farm: causes and mitigations
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Robert E Simmons --- University of Cape Town, South Africa Marlei Martins --- , South AfricaWe describe a collision of Africa’s largest raptor, the Martial Eagle Polemaetus bellicosus with a spinning blade at a South African wind farm in the Eastern Cape in July 2016, and the abandonment of the territory following a second fatal... -
Using stakeholder knowledge to co-produce research priorities for a raptor species vulnerable to impacts of wind energy facilities
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Merlyn Nomusa Nkomo --- University of Cape Town, South Africa Megan Murgatroyd --- University of Cape Town, South Africa Samantha Ralston-Paton --- , South Africa Arjun Amar --- University of Cape Town, South AfricaThe global energy transition necessitates a rapid increase in infrastructure in developing countries, including for wind energy facilities (WEFs). Concerns arise regarding the negative impacts of WEFs on biodiversity, especially on birds of prey or raptors and other volant animals... -
Using wing bar patterns to identify sex in Crowned Eagles Stephanoaetus coronatus: A misleading field characteristic
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Shane C Sumasgutner --- Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, South Africa Lauren K Common --- University of Vienna, Austria Simon Thomsett --- Soysambu Conservancy, Kenya Colleen T Downs --- Centre for Functional Biodiversity, School of Life Sciences, University of KwaZulu-Natal, South Africa Petra Sumasgutner --- University of Vienna, AustriaAlmost universally, raptors exhibit some degree of sexual size dimorphism, with many species also having substantial sexual dimorphism in plumage patterns. The monophyletic clade ‘booted eagles’ generally do not, except for the Crowned Eagle Stephanoaetus coronatus, which are believed to... -
The importance of Dakhla (Western Sahara) as a wintering site for Ospreys Pandion haliaetus: first systematic census
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Carlos A Torralvo --- CIMA, Spain Jorge García-Macía --- CIMA, Spain Miguel Ferrer --- CSIC, Spain Virginia Morandini --- National Museum of Natural Sciences of Madrid, CSIC, SpainThe Osprey Pandion haliaetus is a large piscivorous raptor with a world-wide distribution. European populations are often long-distance migrators, overwintering in different regions of Africa and the Mediterranean basin. Until now, citizen science and occasional reports suggested that the Dahkla... -
Urban persistence and species interactions: diverging trends in the abundance of Peregrine Falcons Falco peregrinus and Lanner Falcons F. biarmicus across southern Africa using the Southern African Bird Atlas Project
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Kyle T Govender --- School of Life Sciences, University of KwaZulu-Natal, South Africa Mfundo ST Maseko --- School of Life Sciences, University of KwaZulu-Natal, South Africa Alan TK Lee --- School of Life Sciences, University of KwaZulu-Natal, South Africa Colleen T Downs --- School of Life Sciences, University of KwaZulu-Natal, South AfricaCitizen science has emerged as a powerful tool for engaging the public in ecological data collection, crucial for monitoring species’ distributions and abundance over large geographic scales and extended time periods. This study used data from the Southern African Bird... -
Breeding dynamics and threats identified at a small colony of Critically Endangered Rüppell’s Vultures Gyps rueppellii in a Ugandan Forest Reserve
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Ivan Oruka --- Gulu University, Uganda Geoffrey M Malinga --- Gulu University, Uganda Stonewall S Kato --- Gulu University, Uganda Darcy Ogada --- , United States of America Derek Pomeroy --- Makerere University, UgandaThe Critically Endangered Rüppell’s Vulture Gyps rueppelli is a resident species in Uganda, with only one known breeding site in Luku Central Forest Reserve, Arua district. The natural resources in this protected forest reserve are under severe threat due to...