Nomadic Desert Birds
(Sprache: Englisch)
My interest in the behaviour and movements of birds of arid and semi-arid ecosystems began when my wife, Sue Milton, and I were Roy Siegfried, Director, at that time, of the Percy approached by Prof. FitzPatrick Institute of African Ornithology, to set up a...
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My interest in the behaviour and movements of birds of arid and semi-arid ecosystems began when my wife, Sue Milton, and I were Roy Siegfried, Director, at that time, of the Percy approached by Prof. FitzPatrick Institute of African Ornithology, to set up a project to investigate granivory in the South African Karoo. Sue and I spent some time finding a suitable study site, setting up accommodations and an automatic weather station at Tierberg, in the southern Karoo near the village of Prince Albert, and planning projects. Among our first projects was a transect where we noted plant phe nology, measured seed densities on the soil surface, counted birds, observed ant activity, measured soil surface temperatures and col lected whatever climate data we could at 40 sites along a 200-km oval route. Along the way, we became interested in the marked presence and absence of birds at certain sites - abundant birds one day, and very few birds at the same site a month later. Subsequent counts along fixed transects through shrublands confirmed that a number of bird species were highly nomadic over short and long distances, locally and regionally, leading to speculation on how widespread these movements were in the arid ecosystems of the world.
Inhaltsverzeichnis zu „Nomadic Desert Birds “
1 Introduction1.1. Arid and semi-arid regions
1.2. The avifauna of deserts and semi-deserts
2 Migrations and movements of desert birds
2.1. Movements in desert and semi-desert avifaunas: an overview
2.2.Migrants in arid ecosystems
2.3. Residents in arid ecosystems
2.3.1. How sedentary are "resident" birds?
2.4. Conclusions
3 The nomadic avifauna
3.1. The influence of rainfall and temperature on movements in birds
3.2. Predictability of movements by non-migratory birds in arid ecosystems
3.2.1. Southern Africa
3.2.2. North Africa
3.2.3. Asia
3.2.4. North America
3.2.5. South America
3.2.6. Australia
3.3. Phylogeny of nomadic birds
3.4. Conclusions
4 Habitats and densities of nomadic birds
4.1. Habitats
4.1.1. Patchiness in time and space
4.2. Densities of nomadic birds
4.3. Conclusions
5 Food and foraging
5.1. Food of nomadic birds
5.2. Foraging behaviour
5.3. Conclusions
6 Reproduction, moult and mortality
6.1. Nest sites in nomadic birds
6.1.1. A case study. Nest site selection in Wattled Starlings Creatophora cinerea, a nomadic insectivore
6.2. Nest construction and the importance of nest materials as indicators of resources for breeding
6.2. Breeding seasons
6.3. Clutch sizes and nestling periods in arid and semi-arid South Africa
6.5. Breeding success
6.6. Moult
6.7. Conclusions
7 Conservation of nomadic desert birds
Bibliographische Angaben
- Autor: W. Richard J. Dean
- 2003, 185 Seiten, Maße: 16 x 24,1 cm, Gebunden, Englisch
- Herausgegeben: John L. Cloudsley-Thompson, F. Punzo
- Verlag: Springer
- ISBN-10: 3540403930
- ISBN-13: 9783540403937
- Erscheinungsdatum: 09.12.2003
Sprache:
Englisch
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