Harriers of the World

Zusatztext ...a book that is full of ideas and insight. Informationen zum Autor Ornithologist/Specialist Scientist,Research Associate,Fitzpatrick Institute, University of Cape Town and Tourism, Namibia Klappentext Harriers are a charismatic group of birds of prey with a worldwide distribution that have long fascinated bird watchers and scientists. Here for the first time the biology of the world's harriers is treated within one over, in readily accessible language. There are detailed comparisons ofnorthern and southern species, descriptions of mating systems and population dynamics life histories, and insights into the selection pressures shaping the birds' life histories. The author addresses such questions as how females choose partners against their apparent self- interest, how theyadjust to prevailing circumstances to produce the perfect clutch size, and what underlies variations in size dimorphism and copulation patterns. New information resulting from a DNA examination of the group reveals three new harrier species and allows construction of a new phylogeny of theharriers. The author's twin brother brings the book to life by fine original line drawings of these impressive birds. It will be a treat for all raptor biologists, amateur raptophiles, and behavioral ecologists interested in birds of prey. Zusammenfassung Synthesises and analyses the masses of data on the behavioural ecology of harriers. This work offers a comparison of breeding systems among harriers in the northern and southern hemispheres, and includes a phylogeny of the harriers, based on DNA findings. It is illustrated with line drawings of these impressive birds.

...a book that is full of ideas and insight.

Autorentext
Ornithologist/Specialist Scientist,Research Associate,Fitzpatrick Institute, University of Cape Town and Tourism, Namibia

Klappentext
Harriers are a charismatic group of birds of prey with a worldwide distribution that have long fascinated bird watchers and scientists. Here for the first time the biology of the world's harriers is treated within one over, in readily accessible language. There are detailed comparisons of
northern and southern species, descriptions of mating systems and population dynamics life histories, and insights into the selection pressures shaping the birds' life histories. The author addresses such questions as how females choose partners against their apparent self- interest, how they
adjust to prevailing circumstances to produce the perfect clutch size, and what underlies variations in size dimorphism and copulation patterns. New information resulting from a DNA examination of the group reveals three new harrier species and allows construction of a new phylogeny of the
harriers. The author's twin brother brings the book to life by fine original line drawings of these impressive birds. It will be a treat for all raptor biologists, amateur raptophiles, and behavioral ecologists interested in birds of prey.

Inhalt
Preface
1: Introduction: Changing perspectives - from natural history to behavioural ecology
2: Evolution and peculiarities of the harriers
3: Aerial displays: Mate choice and reverse dimorphism
4: Of mice and harriers: Who wins the arms race?
5: Mating patterns: Polygyny and deception
6: Copulation patterns and sperm depletion
7: Sex ratio and egg size manipulation
8: Food and reproduction in the tropics
9: Clutch size and latitude
10: Synthesis
References
Index

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