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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 ultimate resource for birders visiting the ornithologically rich counties of Somerset, Gloucestershire and Wiltshire. These countries are among Britain's finest in terms of habitat diversity, and their avifaunas are comparatively rich as a result. Much has changed in the region since the previous edition of this book – the famous Avalon marshes, for example, have become one of Britain's finest hotspots for wetland birds, for example – but this brand-new fourth edition offers a completely updated review of all the major sites, and many more lesser known ones, with new text and fully revised maps throughout. Where to Watch Birds in Somerset, Gloucestershire and Wiltshire is indispensable for any birder looking to head out into this ornithologically special corner of England.

Reprint of the original, first published in 1874. The publishing house Anatiposi publishes historical books as reprints. Due to their age, these books may have missing pages or inferior quality. Our aim is to preserve these books and make them available to the public so that they do not get lost.