| Titre : | Ostrich 87(2) - mai 20, 2016 |
| Type de document : | Bulletin |
| Paru le : | 00/00/0000 |
Dépouillements
Article
Chacha Werema, Auteur
Little is known about the seasonal elevational movements for most tropical avifauna species. Seasonal elevational movements of the Eastern Olive Sunbird Cyanomitra olivacea were studied along an elevational gradient from 600 to 1 500 m above sea[...]
Article
Dianah W Nalwanga, Auteur ;
Michael Opige, Auteur ;
Roger Q Skeen, Auteur
The distribution of the Karamoja Apalis Apalis karamojae, an East African endemic, has been sparsely documented in Uganda. In October 2011, a survey of the species was carried out near Iriiri in north-eastern Uganda. The main aim was to find out[...]
Article
Tasnim Ayadi, Auteur ;
Abdessalem Hammouda, Auteur ;
Samia Kididi, Auteur ;
Mohamed Habib Yahyaoui, Auteur ;
Slaheddine Selmi, Auteur
Like the majority of Columbiformes, the Laughing Dove Spilopelia senegalensis is sexually monomorphic in plumage, but seems to be slightly dimorphic in size. However, due to the lack of studies little is known about the sexual size dimorphism in[...]
Article
Abdessalem Hammouda, Auteur ;
Foued Hamza, Auteur ;
Jessica Pearce-Duvet, Auteur ;
Slaheddine Selmi, Auteur
This study aimed to test the hypothesis that clutch size covaries with egg volume and hatching success in the Yellow-legged Gull Larus michahellis. We determined clutch size and egg volume in a sample of 131 nests, and we used the data to check [...]
Article
Ute Stenkewitz, Auteur ;
Eric Herrmann, Auteur
Line-transect sampling was used to obtain abundance estimates of an Ant-eating Chat Myrmecocichla formicivora population to compare these with the true size of the population. The population size was determined by a long-term banding study, and [...]
Article
Ara Monadjem, Auteur ;
Kerri Wolter, Auteur ;
Walter Neser, Auteur ;
Keith Bildstein, Auteur
Basic ecological information is still lacking for many species of African vultures. The Hooded Vulture Necrosyrtes monachus is known as a rare breeding resident in north-eastern South Africa. This study set out to monitor the nests of Hooded Vul[...]
Article
Morgan L Hauptfleisch, Auteur ;
Nico L Avenant, Auteur
At Namibia’s two major airports, Hosea Kutako International and Eros (domestic), 117 bird strike collision incidents were recorded between 2006 and 2010. A risk assessment, which included a proposed risk weighting methodology, was conducted at H[...]
Article
Katharine A Howard, Auteur ;
Thomas W Schwertner, Auteur ;
James P Muir, Auteur ;
Ara Monadjem, Auteur
A decline in many African raptor populations may contribute to loss of ecosystem services such as pest control. The Black-shouldered Kite Elanus caeruleus stands out as an exception, experiencing range expansions due to its proclivity for agricu[...]
Article
Gerard Malan, Auteur ;
Eleen Strydom, Auteur ;
Susanne Shultz, Auteur ;
Graham Avery, Auteur
The aim of this study was to investigate the species composition of prey caught in the forest, savanna and emerging habitats in which African Crowned Eagles Stephanoaetus coronatus breed in KwaZulu-Natal province, South Africa. At the 17 nest si[...]
Article
Blair A Zoghby, Auteur ;
Rob M Little, Auteur ;
Peter G Ryan, Auteur ;
Philip AR Hockey, Auteur
Different habitats may be used for the needs of various aspects of an animal’s life. Southern Ground-Hornbill Bucorvus leadbeateri groups announce their presence within year-round territories by calling at dawn from their overnight roost sites. [...]
Article
Fidelis Akunke Atuo, Auteur ;
Samuel T Ivande, Auteur ;
Zingfa J Wala, Auteur ;
Shiiwa Manu, Auteur ;
Timothy J O’Connell, Auteur
The Grey-necked Picathartes Picathartes oreas is a globally threatened bird species in Africa with a wild population of less than 10,000 individuals. The Nigerian population, which has been poorly studied, is restricted to the forest of Cross Ri[...]
Article
Immaculate-Odd Irumba, Auteur ;
Derek Pomeroy, Auteur ;
Michael Perrin, Auteur
The globally Vulnerable Grey Parrot (Psittacus erithacus) has been seen in Kampala, Uganda's capital city, in increasing numbers in recent years. This apparently new behaviour of a typically forest species is helped by the presence of many large[...]
Article
Robert B. Modest, Auteur ;
Shombe N. Hassan, Auteur ;
Alfan A. Rija, Auteur
The persistence of species taxa within fragmented habitats is dependent on the source-sink metapopulation processes, and forest patch size and isolation are key factors. Unveiling species-patch area and/or species-patch isolation relationships m[...]
Article
Kerri Wolter, Auteur ;
Walter Neser, Auteur ;
Margaret T. Hirschauer, Auteur ;
Alvaro Camina, Auteur
Monitoring of eight Cape Vulture Gyps coprotheres breeding colonies in South Africa and Botswana took place between 2010 and 2014 using standardised counting methods. Counts of breeding pairs, nestlings and fledglings were used to calculate bree[...]
