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This classic Poyser title, now in its third revised edition, discusses in depth the various ways in which weather conditions influence bird behaviour. Weather conditions affect food and water availability, decisions about when and how to migrate, timing and success of reproduction, flight style, and physical comfort. Birds display many adaptations in form and behaviour that help them to cope with changing weather conditions, and this fascinating book uses a great variety of examples to explore the subject in depth. The text is enhanced throughout with evocative line drawings, there are many useful tables and figures, and there is also an 8pp colour photograph section.
The way birds behave is one of the vital keys to accurate identification and this book provides the experienced instruction needed to understand and get the most out of watching birds. The guide covers all the fundamental types of bird behaviour, including movement, feeding, breeding, migration, navigation, distribution, range, life and death, all of which are illustrated with beautiful photographs. There is a whole section dedicated to the behaviour of different species groups, from divers and grebes through to sparrows, buntings and finches.
An exploration of the causes and patterns of avian vagrancy Avian vagrancy—the appearance of birds outside of their expected habitat—is a phenomenon that has fascinated natural historians for centuries, from Victorian collectors willing to spend fortunes on a rare specimen to today’s bird-chasing “twitchers.” Yet despite the obsessions of countless ornithologists, what do we actually know about the enigma of vagrancy? In Vagrancy in Birds, Alexander Lees and James Gilroy explore the causes, patterns, and processes behind the occurrences of these unique birds. Lees and Gilroy draw on recent research to answer fundamental questions: What causes avian vagrancy? Why do some places attract so many vagrant birds? Why are some species more predisposed to long-range vagrancy than others? The authors present readers with everything known about the subject, and bring together different lines of evidence to make the case for vagrancy as a biological phenomenon with important implications for avian ecology and evolution. Filled with a wealth of photographs, Vagrancy in Birds will fascinate avian enthusiasts everywhere.
In this study of the world of ancient Greek mariners, the relationship between the natural environment and the techniques and technology of seafaring is focused upon. An initial description of the geology, oceanography and meteorology of Greece and the Mediterranean, is followed by discussion of the resulting sailing conditions, such as physical hazards, sea conditions, winds and availability of shelter, and environmental factors in sailing routes, sailing directions, and navigational techniques. Appendices discuss winter and night sailing, ship design, weather prediction, and related areas of socio-maritime life, such as settlement, religion, and warfare. Wide-ranging sources and illustrations are used to demonstrate both how the environment shaped many of the problems and constraints of seafaring, and also that Greek mariners' understanding of the environment was instrumental in their development of a highly successful seafaring tradition.
E. GWINNER! The phenomenon of bird migration with its large scale dimensions has attracted the attention of naturalists for centuries. Worldwide billions of birds leave their breeding grounds every autumn to migrate to areas with seasonally more favor able conditions. Many of these migrants travel only over a few hundred kilo meters but others cover distances equivalent to the circumference of the earth. Among these long-distance migrants are several billion birds that invade Africa every autumn from their West and Central Palaearctic breeding areas. In the Americas and in Asia the scope of bird migration is of a similar magnitude. Just as impressive as the numbers of birds are their achievements. They have to cope with the enormous energetic costs of long-distance flying. particularly while crossing oceans and deserts that do not allow replenishment of depleted fat reserves. They have to appropriately time the onset and end of migrations. both on a daily and annual basis. And finally. they have to orient their migratory movements in space to reach their species- or population-specific wintering and breeding grounds, irrespective of the variable climatic conditions along their migratory routes.
In biology, few organs have been as elusive as the lung-air sac system of birds. Considerable progress has recently been made to fill the gaps in the knowledge. While summarizing and building on earlier observations and ideas, this book provides cutting-edge details on the development, structure, function, and the evolutionary design of the avian respiratory system. Outlining the mechanisms and principles through which biological complexity and functional novelty have been crafted in a unique gas exchanger, this account will provoke further inquiries on the many still uncertain issues. The specific goal here was to highlight the uniqueness of the design of the avian respiratory system and the factors that obligated it.
P. Berthold and E. Gwinnd Bird migration is an intriguing aspect of the living world - so much so that it has been investigated for as long, and as thoroughly, as almost any other natural phenomenon. Aristotle, who can count as the founder of scientific ornithology, paid very close attention to the migrations of the birds he ob served, but it was not until the reign of Friedrich II, in the first half of the 13th century, that reliable data began to be obtained. From then on, the data base grew rapidly. Systematic studies of bird migration were introduced when the Vogelwarte Rossitten was founded, as the first ornithological biological observation station in the world (see first chapter "In Memory of Vogelwarte Rossitten"). This area later received enormous impetus when ex perimental research on the subject was begun: the large-scale bird-ringing experiment initiated in Rossitten in 1903 by Johannes Thienemann (who was inspired by the pioneering studies of C. C. M. Mortensen), the experiments on photoperiodicity carried out by William Rowan in the 1920s in Canada and retention and release experiments performed by Thienemann in the 1930s in Rossitten, the first experimental study on the orientation of migratory birds. After the Second World War, migration research, while continuing in the previous areas, also expanded into new directions such as radar ornithology, ecophysiology and hormonal control mechanisms, studies of evolution, ge netics, telemetry and others.
Birds as Monitors of Environmental Change looks at how bird populations are affected by pollutants, water quality, and other physical changes and how this scientific knowledge can help in predicting the effects of pollutants and other physical changes in the environment.
Temperature and other climate variables are currently changing at a dramatic rate. As observations have shown, these climatic changes have serious consequences for all organisms and their ability to adapt to changing environmental conditions. Birds are excellent model organisms, with a very active metabolism, they are highly sensitive to environmental changes and as highly mobile creatures they are also extremely reactive. Birds and Climate Change discusses our current knowledge of observed changes and provides guidelines for studies in the years to come so we can document and understand how patterns of changing weather conditions may affect birds. - Provides reviews of long-term datasets - Incorporates meta-analyses of studies about climate change effects on birds - Includes guidelines and suggestions for further studies