Hawks fly at very high altitudes, sometimes over water, and thus their flight behavior and migration patterns are extremely difficult to study. Now, based on nearly ten years of research, this book provides the most complete analysis to date of how hawks migrate. Paul Kerlinger has employed both direct observations and radar techniques to obtain a much more accurate understanding of the migratory behavior of hawks and the "decisions" they make in flight. And, he has integrated data on the flight behavior of raptors in general with information about their ecology, physiology, evolution, and nonmigratory behavior. Kerlinger begins with an overview, discussing ecology and geography, research methods, natural history, and evolution, and atmospheric structure. He then addresses specific aspects of flight behavior: aerodynamics, morphology, mechanics, direction, altitude, flocking, water crossing, speed selection, daily distance traveled, and flight strategies. Kerlinger describes each aspect of behavior quantitatively, testing mechanistic hypotheses. In conclusion, he examines how migrants integrate these behavioral components. Throughout the text he draws comparisons between the migratory flight behavior of hawks and that of other taxa. By means of such comparisons, researchers can gain insight into the selective pressures that shape the behavior of migrant species.

The New England Hawk Migration Study combined the world of hawkwatching and aeronautical engineering for a unique view of birds in flight. Specially outfitted in a Sperber motorglider, which allowed slow, sustained highly maneuverable flying, author Bill Welch and his colleagues followed the hawks on their East Coast migrations, riding the same thermals as the raptors, and making detailed observations never before possible of hawk flight and navigation.With over 35 black-and white photographs and charts, Hawks at My Wingtipsis a detailed and fascinating look at the worlds of birdwatching and high-performance flying. Both written and photographic accounts of these flights capture a feeling of what it is like to soar with nothing but wind under your wings!

Observing birds often raises many intriguing questions. Such as what is the incubation time for those robin eggs sitting in the nest above the porch light? What kinds of flowers attract humming birds? What are the migratory distances of various species? What are the major causes of bird deaths? The Bird Almanac is an invaluable resource, impressive in scope and depth and complemented with tables and illustrations. This Second Edition has been reformatted for easier use and now features quick-find tabs and an index. The first section of the book comprehensively covers the history, biology and behavior of birds. Bird physiology, biological systems and anatomy are explained in easy-to-understand terms and annotated illustrations. Other topics include: Fossil history of birds Reproduction and mortality Threatened and endangered species Major birding festivals and competitions How to attract specific species to the backyard Extensive resources for bird-lovers including the top birding locations in America Birding code of ethics The second section consists of an authoritative world checklist of bird species. The birds are organized by taxonomic order and listed by common and Latin name. The valuable information in The Bird Almanac fills in the gaps in knowledge of even the most seasoned birder.

Given their roles in the ecosystem, raptors are widely considered the flagship or umbrella species among birds. Most species undertake a seasonal journey that is impressive because of the length, and the imposing natural barriers such as deserts and seas that they fly over. The migration of birds of prey has unique characteristics in the animal world because of their morphology and flight style. The flying path of Afro-Palearctic migrants between breeding and wintering grounds is determined by several factors such as morphology of the birds, geography, behavioural adaptations. The book analyses the migration patterns of raptors along the Afro-Palearctic migratory system, and summarizes the recent research on these top predator species. Behavioural adaptations such as the importance of social interactions and the modulation of the different flight styles as well as ecological interactions with the encountered environment and weather conditions en route are described in the book. Moreover, the impact of climate change on the migratory behaviour and key conservation issues are discussed. The book provides an overview of the migratory characteristics and flyway patterns of all European raptors species and also some Asian ones. These chapters have been written by some of the most important raptor specialists, giving a complete picture of the different migration strategies on the basis of both traditional methods and new technologies.

The Migration Ecology of Birds, Second Edition covers all aspects of this absorbing subject, including migratory processes, problems of navigation and vagrancy, timing and physiological control of migration, large-scale movement patterns, the effects of recent climate change, the problems that migrants face, and the factors that limit their populations. This book provides a thorough and in-depth review of the state of the science, with the text supplemented by abundant tables, maps and diagrams. Written by a world-renowned avian ecology and migration researcher, this book reveals the extraordinary adaptability of birds to the variable and changing conditions across the globe. This book represents the most updated and detailed review of bird migration, its evolution, ecology and bird physiology. Written in a clear and readable style, it will appeal not only to migration researchers in the field and ornithologists, but to anyone with an interest in this fascinating subject. Features updated and trending ecological aspects, including various types of bird movements, dispersal and nomadism, and how they relate to food supplies and other external conditions Contains numerous tables, maps, diagrams, a glossary, and a bibliography of more than 3,000 up-to-date references Written by an active researcher with a distinguished career in avian ecology, including migration research

Hawk and eagle watching is an increasingly popular birding activity. Special knowledge is required, however, and in this lavishly photographed, full-color book, naturalists/authors Clay and Patricia Sutton provide all the information readers need to know, no matter where they live in the United States and Canada. Full-color photos throughout.