Across North America, tens of thousands of people gather every spring and fall at more than one thousand known hawk migration sites--from New Jersey's Cape May to California's Golden Gate. Yet, as many discover, a standard field guide, with its emphasis on plumage, is often of little help in identifying those raptors soaring, gliding, or flapping far, far away.Hawks from Every Angle takes hawk identification to new heights. It offers a fresh approach that literally looks at the birds from every angle, compares and contrasts deceptively similar species, and provides the pictures (and words) needed for identification in the field. Jerry Liguori pinpoints innovative, field-tested identification traits for each species from the various angles that they are seen.Featuring 339 striking color photos on 68 color plates and 32 black & white photos, Hawks from Every Angle is unique in presenting a host of meticulously crafted pictures for each of the 19 species it covers in detail--the species most common to migration sites throughout the United States and Canada. All aspects of raptor identification are discussed, including plumage, shape, and flight style traits.For all birders who follow hawk migration and have found themselves wondering if the raptor in the sky matches the one in the guide, Hawks from Every Angle--distilling an expert's years of experience for the first time into a comprehensive array of truly useful photos and other pointers for each species--is quite simply a must.Key Features? The essential new approach to identifying hawks in flight Innovative, accurate, and field-tested identification traits for each species 339 color photos on 68 color plates, 32 black & white photos Compares and contrasts species easily confused with one another, and provides the pictures (and words) needed for identification in the field Covers in detail 19 species common to migration sites throughout the North America Discusses light conditions, how molt can alter the shape of a bird, aberrant plumages, and migration seasons and sites User-friendly format

    A concise atlas of anatomy, it contains more than 200 specially prepared accurate and clear drawings that include material never illustrated before. The text is as informative as the drawings; written at a level appropriate to undergraduate students and to bird lovers in general, it discusses why birds look and act the way they do.Designed to supplement a basic ornithology textbook, the Manual of Ornithology covers systematics and evolution, topography, feathers and flight, the skeleton and musculature, and the digestive, circulatory, respiratory, excretory, reproductive, sensory, and nervous systems of birds, as well as field techniques for watching and studying birds. Each chapter concludes with a list of key references for the topic covered, with a comprehensive bibliography at the end of the volume. The book will be a guide and reference for every level of bird study—a basic tool for investigation for anyone curious about the fascinating world of birds.

    It is the most comprehensive one-volume guide to the Neotropics available today. Widely praised in its first edition, it remains a book of unparalleled value to tourists, students, and scientists alike. This second edition has been substantially revised and expanded to incorporate the abundance of new scientific information that has been produced since it was first published in 1989. Major additions have been made to every chapter, and new chapters have been added on Neotropical ecosystems, human ecology, and the effects of deforestation. Biodiversity and its preservation are discussed throughout the book, and Neotropical evolution is described in detail. This new edition offers all new drawings and photographs, many of them in color. As enthusiastic readers of the first edition will attest, this is a charming book. Wearing his learning lightly and writing with ease and humor, John Kricher presents the complexities of tropical ecology as accessible and nonintimidating. Kricher is so thoroughly knowledgeable and the book is so complete in its coverage that general readers and ecotourists will not need any other book to help them identify and understand the plants and animals, from birds to bugs, that they will encounter in their travels to the New World tropics. At the same time, it will fascinate armchair travelers and students who may get no closer to the Neotropics than this engagingly written book.

    If it ceased flowing, the water held in its reservoirs might hold out for three to four years, but after that it would be necessary to abandon most of southern California and Arizona, and much of Colorado, New Mexico, Utah and Wyoming. For the entire American Southwest the Colorado is indeed the river of life, which makes it all the more tragic and ironic that by the time it approaches its final destination, it has been reduced to a shadow upon the sand, its delta dry and deserted, its flow a toxic trickle seeping into the sea.   In this remarkable blend of history, science, and personal observation, acclaimed author Wade Davis tells the story of America’s Nile, how it once flowed freely and how human intervention has left it near exhaustion, altering the water temperature, volume, local species, and shoreline of the river Theodore Roosevelt once urged us to “leave it as it is.” Yet despite a century of human interference, Davis writes, the splendor of the Colorado lives on in the river’s remaining wild rapids, quiet pools, and sweeping canyons. The story of the Colorado River is the human quest for progress and its inevitable if unintended effects—and an opportunity to learn from past mistakes and foster the rebirth of America’s most iconic waterway.   A beautifully told story of historical adventure and natural beauty, River Notes is a fascinating journey down the river and through mankind’s complicated and destructive relationship with one of its greatest natural resources.