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Birds of Two Worlds
For centuries biologists have tried to understand the underpinnings of avian migration: where birds go and why, why some migrate and some do not, how they adapt to a changing environment, and how migratory systems evolve. Twenty-five years ago the answers to many of these questions were addressed by a collection of migration experts in Keast and Morton's classic work Migrant Birds in the Neotropics. In 1992, Hagan and Johnston published a follow-up book, Ecology and Conservation of Neotropical Migrant Landbirds. In Birds of Two Worlds Russell Greenberg and Peter Marra bring together the world's experts on avian migration to discuss its ecology and evolution. The contributors move the discussion of migration to a global stage, looking at all avian migration systems and delving deeper into the evolutionary foundations of migratory behavior. Readers interested in the biology, behavior, ecology, and evolution of birds have waited a decade to see a worthy successor to the earlier classics. Birds of Two Worlds will complete the trilogy and become indispensable for ornithologists, evolutionary biologists, serious birders, and public and academic libraries.
The Ironmonger
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Straight & True
The arrow, essentially a specialized spear, is among the most ancient human inventions and can be found in cultures throughout the world. The need to launch a projectile farther and with greater accuracy than is possible with the human arm gave rise to a variety of solutions. Spearthrowers which extend the length of the users arm and therefore transfer greater power to the projectile were developed far back in prehistory, and both the American Indian atlatl and the Australian woomera are examples of this technology. Blowpipes, too, are recorded in various cultures and represent another ancient technology. It was soon discovered that a stringed bow could launch a small spear-like projectile...
The Monthly Magazine
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The Bond Record
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Handbook of Obesity
With rates of obesity soaring to epidemic proportions, this reference strives to unearth new treatment regimens and pharmaceuticals for the prevention and treatment of obesity. Offering the latest recommendations and research from the most respected leaders in the field, the Second Edition compiles the most noteworthy studies on the evaluation and
