Автор: Powell Robert, Joseph T. Collins, A01 Название: Key to the Herpetofauna of the Continental United States and Canada ISBN: 0700628908 ISBN-13(EAN): 9780700628902 Издательство: Mare Nostrum (Eurospan) Рейтинг: Цена: 3761.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: This profusely illustrated comprehensive key for identifying amphibians and reptiles from the continental United States and Canada incorporates a wealth of scientific findings.Since the first edition was published in 1998 and the second in 2012, the number of currently recognized species of native amphibians and reptiles in the area covered by this key has increased from 545 to 634 to 685, and the number of established non-native species has increased from 39 to 58 to 67. The increase in native taxa reflects the dynamic nature of modern systematics and the use of new (especially molecular) techniques to elucidate relationships and redefine species boundaries. The increase in non-native species reflects the porosity of the North American borders when it comes to controlling animal imports.The key is easy to use and illustrated with outstanding line drawings that show details of color patterns and structures used for identification. To accommodate the additional taxa, the number of line drawings in this third edition has increased from 257 to 279 to 295. In addition, nine maps illustrate the distributions of species that have been recognized since the publication of maps in the most recent editions of the Peterson Field Guides to the reptiles and amphibians of eastern, central, and western North America. A large number of annotations detail current taxonomic ambiguities or disagreements and the literature cited has been expanded. Collectively these features enhance opportunities to teach and learn the classification and identification of amphibians and reptiles in the continental United States and Canada.
Автор: Adam Watson, Stuart Rae Название: Observations of Golden Eagles in Scotland ISBN: 0888390300 ISBN-13(EAN): 9780888390301 Издательство: Gazelle Book Services Рейтинг: Цена: 10294.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The golden eagle is widely considered one of the worlds most magnificent birds. It is the epitome of wild places. The bird has a huge world distribution, and each pair of eagles has a large home range. They shy away from man so those who study them spend most of their time watching for, but not seeing the elusive bird. These difficulties and a love of the eagles hill country in Scotland inspired the authors. In Scotland, the golden eagle mostly lives on the hill ground of the Highlands where some of the mainland uses over the past two hundred years have been sheep grazing, deer-stalking and grouse shooting. Here the authors describe eagle numbers, nesting behaviour and breeding success in two study areas; in north-east and north-west Scotland. They use data from long-term studies, supported with research into historical documents. The result is a deep understanding of how eagles are faring, and how they have been or might be affected by human land use. Adam Watson and Stuart Rae have studied golden eagles for more than seventy and forty years, and have spent thousands of days in eagle country. Their professional research and personal studies have been on various ecological topics that pertain to the hills, and both have also climbed, skied and generally explored in much of the Highlands, always making observations on aspects of the hills and their wildlife. They are founder members of the North East Scotland Raptor Study Group, and they have studied other raptors besides their main work on golden eagles. They use an objective approach to golden eagles, as with their other subjects, relying on: field notes, reading the land, and interpreting how they fit in the Highlands.
Описание: The golden eagle is widely considered one of the worlds most magnificent birds. It is the epitome of wild places. The bird has a huge world distribution, and each pair of eagles has a large home range. They shy away from man so those who study them spend most of their time watching for, but not seeing the elusive bird. These difficulties and a love of the eagles hill country in Scotland inspired the authors. In Scotland, the golden eagle mostly lives on the hill ground of the Highlands where some of the mainland uses over the past two hundred years have been sheep grazing, deer-stalking and grouse shooting. Here the authors describe eagle numbers, nesting behaviour and breeding success in two study areas; in north-east and north-west Scotland. They use data from long-term studies, supported with research into historical documents. The result is a deep understanding of how eagles are faring, and how they have been or might be affected by human land use. Adam Watson and Stuart Rae have studied golden eagles for more than seventy and forty years, and have spent thousands of days in eagle country. Their professional research and personal studies have been on various ecological topics that pertain to the hills, and both have also climbed, skied and generally explored in much of the Highlands, always making observations on aspects of the hills and their wildlife. They are founder members of the North East Scotland Raptor Study Group, and they have studied other raptors besides their main work on golden eagles. They use an objective approach to golden eagles, as with their other subjects, relying on: field notes, reading the land, and interpreting how they fit in the Highlands.
Despite their abundance in many parts of North America, salamanders have generally been neglected by all but a few specialists. In this book—first published in 1943—Sherman C. Bishop discusses in a lively but authoritative manner the 126 species and subspecies of salamanders that are known to exist in the United States, Canada, and Baja California.Group by group, Bishop describes salamanders in accounts that give the common and technical names, type of locality, range, habitat, size, anatomical characteristics, color, breeding habits, and relationships—all in a uniform arrangement that makes the handbook especially convenient for studying both living animals and laboratory specimens. His brief introduction surveys the relationships and general habits of salamanders and gives information on collecting and preserving them. In his foreword to the 1994 reprint edition, Edmund D. Brodie, Jr., a specialist on salamanders, updates the taxonomy of the group.
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