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Klappentext The migration of birds is one of the most astonishing feats in the natural world. Millions of bird migrate often very long distances in order to benefit from seasonal resource surpluses and to avoid predators and competitors. The aim of this book is to give a general overview of the whole migration phenomenon. Details of many amazing peculiarities and unresolved questions are included. Zusammenfassung Millions of birds migrate large distances to benefit from seasonal resources and to avoid predators and competitors. This book is a complete overview of the migration phenomenon and covers migratory habits of birds! course and timing of flights! navigation! and the hazards of migration. Inhaltsverzeichnis 1. The journeys of birds and the ideas of man; 2. The rotating world of migratory birds; 3. Summer and winter quarters, Birds in wetlands, Birds which forage on lake and sea bottom, Birds which feed on terrestrial plants, Birds which feed on fish, Birds which obtain food at the water's surface, Birds of prey, Insect-eaters, Seed-eaters, Omnivorous birds, The evolution of bird migration; 4. The migratory journey, Methods of studying bird migration, Flight speed, Migration in flocks, Soaring flight, Flight altitude, Fat as flight fuel, Diurnal and nocturnal migration, Weather and wind, Dangers during the migration; 5. Orientation and navigation, The sensory world of birds, Different compasses, How do birds find the right migration route?; Bibliography; Index.
