Paul A. Johnsgard – författare
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21 produkter
21 produkter
Inbunden, Engelska, 1998
2 241 kr
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Obligatory brood parasites are birds that reproduce by laying their eggs in the nests of other species. This book discusses the ecological and evolutionary aspects of this remarkable behavioural adaptation.
E-bok
PDF, Engelska, 1997911 kr
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The evolutionary, ecological and behavioral questions posed by obligate brood parasites are among the most intriguing of all contemporary ornithological topics. Avian brood parasites lay their eggs in the nests of other birds and may be a major contributing factor driving several species of songbirds to near extinction. As one of the first books to present a comprehensive overview of this fascinating phenomenon, this work discusses the comparative biology and co-evolutionary adaptations exhibited by the five families of birds that engage in such behavior. Several chapters dealing with the comparative biology of both intraspecific and interspecific brood parasites, are followed by individual accounts of all known species--nearly 100 altogether, primarily cowbirds and cuckoos. Some of the more remarkable behavioral and structural adaptations of these birds include egg mimicry, juvenile mimicry, elimination by starvation or actual attack of other nestlings or host eggs, and even the learning and partial mimicry of host song traits. An extended glossary, a list of Latin names, 400 literature citations and range maps of all parasitic species discussed are also included. Detailed line drawings by the author enhance this synthesis of biological and ecological information.
Häftad, Engelska, 1999
227 kr
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"As I write this, I am sitting in a cabin at Cedar Point Biological Station in southwestern Nebraska.... The glorious elemental mixture of earth, water, and sky around me is the home of nearly three hundred species of birds, and comprises one of my favorite places in the world. Here no radio stations blare out the most recent results of meaningless sports events ... no traffic noises confound the senses. Instead the wind is the unquestioned dominating summer influence. The prairie grasses bend willingly and gracefully before it, and the leaves of the cottonwood trees convert its breezes into soft music."Paul Johnsgard is one of America's most prominent ornithologists and a world authority on waterfowl behavior. In these popularly written, often lyrical essays, he describes some of his most fascinating encounters with birds, from watching the annual mating displays of prairie-chickens on a hilltop in Pawnee County, Nebraska, to attempting to solve some of the mysteries surrounding Australia's nearly flightless musk duck.Reflecting his worldwide interests and travels, the birds Johnsgard describes inhabit many parts of the globe. Grouping the birds by the element they frequent most-earth, water, or sky-he weaves a wealth of accurate natural history into personal stories drawn from a lifetime of avian observation. And, as a bonus, Johnsgard's lovely pen-and-ink drawings illustrate each species he describes.
Häftad, Engelska, 2008
156 kr
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Arising in two separate streams high in the Rockies and flowing east across the plains to meet the Missouri near Omaha, Nebraska, the Platte River is a microcosm of the geologic, plant, animal, and human worlds. Way station for the sandhill cranes, home of the Plains Indians, and artery for the great westward migrations of the nineteenth century, the Platte Valley offers a rich diversity of life and history. Focusing on the central role the Platte has played in shaping Nebraska and its heritage, both human and natural, Paul A. Johnsgard presents in this book a “brief and personal portrait of the river as it has existed in the past and still exists today.” “My special hope in doing so,” he writes, “is that the value of the river as a living, complex, and natural ecologic system can be more fully appreciated, and that whatever steps may be necessary might be taken to preserve the river’s integrity.” Johnsgard tells the story of the Platte from prehistoric times to the present and then assesses its future. A selection of photographs and checklists of birds, mammals, amphibians and reptiles, fishes, and common plants of the Platte River and its valley enhance the book’s interest and usefulness. This Bison Books edition includes a new preface and afterword by the author.
Häftad, Engelska, 2011
156 kr
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Driving west from Lincoln to Grand Island, Nebraska, Paul A. Johnsgard remarks, is like driving backward in time. "I suspect," he says, "that the migrating cranes of a pre–ice age period some ten million years ago would fully understand every nuance of the crane conversation going on today along the Platte." Johnsgard has spent nearly a half century observing cranes, from a yearly foray to Nebraska's Platte River valley to see the spring migration, to pilgrimages to the birds' wintering grounds in Arizona and nesting territory in Alaska. In this book he draws from his own extensive experience as well as the latest science to offer a richly detailed and deeply felt account of the ecology of sandhill and whooping cranes and the wetlands in which they live.Incorporating current information on changing migration patterns, population trends, and breeding ranges, Johnsgard explains the life cycle of the crane, as well as the significance of these species to our natural world. He also writes frankly of the uncertain future of these majestic birds, as cranes and their habitats face the effects of climate change and increasing human population pressures. Illustrated with the author's own ink drawings and containing a detailed guide to crane-viewing sites in the United States and Canada, this book is at once an invaluable reference and an eloquent testimony to how much these birds truly mean.
Häftad, Engelska, 2014
239 kr
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A respected author and scholar, Paul A. Johnsgard has spent a lifetime observing the natural delights of Nebraska's woodlands, grasslands, and wetlands. Seasons of the Tallgrass Prairie collects his musings on Nebraska's natural history and the issues of conservation facing our future. Johnsgard crafts essays featuring snow geese, owls, hummingbirds, and other creatures against the backdrop of Great Plains landscapes. He describes prairie chickens courting during predawn hours and the calls of sandhill cranes; he evokes the magic of lying upon the prairie, hearing only the sounds of insects and the wind through the grasses. From reflections following a visit to a Pawnee sacred site to meditations on the perils facing the state's finite natural resources, Seasons of the Tallgrass Prairie celebrates the gifts of a half century spent roaming Nebraska's back roads, trails, and sometimes-forgotten places.
Häftad, Engelska, 2014
239 kr
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This book by the renowned naturalist and writer Paul A. Johnsgard tells the complex biological and environmental story of the western Great Plains under the black-tailed prairie dog's reign—and then under a brief but devastating century of human dominion.An introduction to the ecosystem of the shortgrass prairie, Prairie Dog Empire describes in clear and detailed terms the habitat and habits of black-tailed prairie dogs; their subsistence, seasonal behavior, and the makeup of their vast colonies; and the ways in which their "towns" transform the surrounding terrain—for better or for worse. Johnsgard recounts how this terrain has in turn been transformed over the past century by the destruction of prairie dogs and their grassland habitats. This book also offers a rare and invaluable close-up view of the rich history and threatened future of the creature once considered the "keystone" species of the western plains.Included are maps, drawings, and listings of more than two hundred natural grassland preserves where many of the region's native plants and animals may still be seen and studied.
Häftad, Engelska, 2007
264 kr
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Although its history is etched on canyon walls reaching back twenty million years, the Niobrara is very much a river of today. Stretching 535 miles from its headwaters to the Missouri River, it is one of Nebraska's least altered waterways and is designated as a national scenic river. Its waterfalls and wildlife make it a haven for outdoor enthusiasts, but pressures from development still threaten its scenic and ecological wonders. This first book-length study of the Niobrara is a comprehensive look at an ecological treasure. Paul A. Johnsgard reviews the river's history from its geologic past through prehistoric settlement to the present and highlights its historical and biological features. Writing from this crossroads of eastern and western species, Johnsgard also describes the Niobrara's varied plants and animals, providing extensive information on bird populations. He offers portraits of sixteen species of special conservation concern, such as the black-tailed prairie dog and the olive-backed pocket mouse. Drawings by Johnsgard, information tables on various species, plus site lists make the book an invaluable reference. It conveys the Niobrara's value as a recreational and scientific resource to help visitors better appreciate this riparian paradise while offering specialists an unimpeachable guide to its scientific riches. The Niobrara includes chapters by Jon Farrar and Duane Gudgel.
Häftad, Engelska, 1979
154 kr
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For centuries the snow goose has signified the passing seasons to the Indians—its white feathers a symbol of the breadth of life and a reminder of the roles the birds played as messengers between heaven and earth. The importance of the geese in these roles is attested by their prominence in Indian lore and myth. As a boy growing up in North Dakota, Paul A. Johnsgard measured his winters not by conventional time units, but in the days it took for the snow geese to return from their wintering grounds to Lake Traverse. In this book he recounts the story of one year in the life of a pair of snow geese-the incubation and breeding of the young in the Arctic, their hazardous migration to winter quarters near the Gulf of Mexico, and the spring migration back to the Arctic.
Häftad, Engelska, 1998
145 kr
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Graced with illustrations by the author, Crane Music introduces the two North American crane species. The sandhill, most often seen, is within easy reach of bird-watchers in the center of the continent. Less visible is the whooping crane, struggling back from near extinction. Paul Johnsgard follows these elegant birds through a year's cycle, describing their seasonal migrations, natural habitats, breeding biology, call patterns—angelic to the bird-lover's ear—and fascinating dancing.The largest and most spectacular migratory concentration of cranes happens each spring when the Platte River valley becomes the staging ground for an amazing gathering of four hundred thousand to five hundred thousand sandhills en route from the South to the Arctic tundra. Johnsgard describes this incredible event as well as memorable personal encounters with the cranes. His knowledge of them transcends natural history, covering their importance in religion and mythology.
Häftad, Engelska, 2003
158 kr
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Lewis and Clark on the Great Plains is an easy-to-use reference on the wildlife that Meriwether Lewis and William Clark encountered during their 1804–6 Corps of Discovery expedition. More than one hundred animals and plants that were first carefully described and in some cases discovered by Lewis and Clark are identified here. More than accounts of the regional flora and fauna, Lewis and Clark on the Great Plains examines the lasting importance of the expedition's discoveries, the significance of the Plains plants and animals to local Native Americans, and the current status of Plains wildlife. Lavishly illustrated with Paul A. Johnsgard's drawings of mammals, birds, fish, reptiles, and plants, the book also includes a guide to the Lewis and Clark sites of botanical and zoological interest and more than seventy sites where readers can follow in the footsteps of two of America's greatest pioneering naturalists.
Häftad, Engelska, 2005
344 kr
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Where the eastern and western currents of American life merge as smoothly as one river flows into another is a place called Nebraska. There we find the Platte, a river that gave sustenance to the countless migrants who once trudged westward along the Mormon and Oregon trails. We find the Sandhills, a vast region of sandy grassland that represents the largest area of dunes and the grandest and least disturbed region of mixed-grass prairies in all the Western Hemisphere. And, below it all, we find the Ogallala aquifer, the largest potential source of unpolluted water anywhere. These ecological treasures are all part of the nature of Nebraska. With characteristic clarity, energy, and charm, Paul A. Johnsgard guides us through Nebraska's incredible biodiversity, introducing us to each ecosystem and the flora and fauna it sustains and inviting us to contemplate the purpose and secrets of the natural world as we consider our own roles and responsibilities in our connection with it.
Häftad, Engelska, 2006
161 kr
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George Miksch Sutton is one of the best known and most beloved bird artists of the twentieth century. This marvelous book presents thirty-five paintigs of downy chicks, nestlings, and fledglings painted from life by Sutton. The exquisite watercolrs, housed in the Field Museum of Natural History, span three decades and depict nineteen species of North American birds. Many of the paintings are reproduced here for the first time.Sutton was fond of painting young birds from life and of recording their developmental changes. Marked by delicate bruskwork and subtle color variations, his paintings document characteristic features of the birds' species as well as capturing the poses and attributes that make each bird seem so unique. Some paintings show not only juvenal plumage but also head portraits of adult plumage. The nineteen species include familiar garden birds such as cardinals, Great Plains inhabitants such as the grassland sparrows, and upland and wetland birds, including bobwhites, moorhens, and sandpipers.In his introduction to the collection, ornithologist Paul Johnsgard discusses Sutton's contributions to bird art and to ornithology. And is essays accompanying the paintings, Johnsgard describes his and Sutton's personal encounters with the birds.A tribute to Sutton's genius as both an artist and an ornithologist, Baby Bird Portraits will be welcomed by ornithologists, bird enthusiasts, and Sutton's legion of admirers.
Häftad, Engelska, 2010
402 kr
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An in-depth biological overview of a fascinating group of waterfowl'Paul A. Johnsgard's first glimpse of a North American ruddy duck - a chestnut-brown bird with a blue bill, black head, and white cheeks - led to decades of observing the eight extant species of stiff-tailed ducks. In Ruddy Ducks and Other Stifftails, he and Montserrat Carbonell introduce general readers and ornithologists to the ruddy's morphology, behavior, ecology, and diverse relatives. This richly illustrated volume highlights these unique species at a critical time, when their wetlands habitats are increasingly at risk.
Häftad, Engelska
212 kr
Skickas inom 3-6 vardagar
Häftad, Engelska, 2017
157 kr
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With Paul A. Johnsgard, we follow the migration of the sandhill cranes from the American Southwest to their Alaskan breeding grounds and back again, an annual pattern that has persisted over millions of years. By selecting four historic time frames of the migration between 1860 and 1980, Johnsgard illustrates how humans have influenced the flocks and how different American cultures have variously responded to the birds and perceived their value.Each section focuses on the interactions between children of four different American cultures and sandhill cranes, triggered by events occurring during the annual life cycle of the cranes. The story is enriched by the author’s exquisite illustrations, by Zuni prayers, and by Inuit and Pueblo legends. With a new preface and afterword and a new gallery of photographs by the author, Those of the Gray Wind is a classic story of a timeless ritual that can be enjoyed for generations to come.
Häftad, Engelska, 2020
369 kr
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In Wildlife of Nebraska: A Natural History, Paul A. Johnsgard surveys the variety and biology of more than six hundred Nebraska species.Narrative accounts describe the ecology and biology of the state’s birds, its mammals, and its reptiles and amphibians, summarizing the abundance, distributions, and habitats of this wildlife. To provide an introduction to the state’s major ecosystems, climate, and topography, Johnsgard examines major public-access natural areas, including national monuments, wildlife refuges and grasslands, state parks and wildlife management areas, and nature preserves.Including more than thirty-five line drawings by the author along with physiographic, ecological, and historical maps, Wildlife of Nebraska is an essential guide to the wildlife of the Cornhusker State.
Häftad, Engelska, 2013
178 kr
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Häftad, Engelska, 2013
275 kr
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Häftad, Engelska, 2018
246 kr
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Häftad, Engelska, 2015
357 kr
Tillfälligt slut
“Since long before medieval times cranes have been considered messengers of the gods, calling annually from on high to remind humans below of the passing years and of their own mortality. Now it is up to humans to take responsibility for controlling our own fate—and also to cry out to protect not only cranes but all the other wonderful creatures that share our increasingly fragile and threatened planetary ecosystem with us."—Paul A. Johnsgard, from the acknowledgmentsAccompanied by the stunning photography of Thomas D. Mangelsen, A Chorus of Cranes details the natural history, biology, and conservation issues surrounding the abundant sandhill crane and the endangered whooping crane in North America. Author Paul A. Johnsgard, one of the leading authorities on cranes and crane biology, describes the fascinating social behaviors, beautiful natural habitats, and grueling seasonal migrations that have stirred the hearts of people as far back as medieval times and garnered the crane a place in folklore and mythology across continents.Johnsgard has substantially updated and significantly expanded his 1991 work Crane Music, incorporating new information on the biology and status of these two North American cranes and providing abbreviated summaries on the other thirteen crane species of the world. The stories of these birds and their contrasting fates provide an instructive and moving history of bird conservation in North America. A Chorus of Cranes is a gorgeous and invaluable resource for crane enthusiasts, birders, natural historians, and conservationists alike.The University Press of Colorado gratefully acknowledges the generous support of the Iain Nicholson Audubon Center at Rowe Sanctuary, Audubon Nebraska, Ron and Judy Parks, Wagon Tongue Creek Farm, and the Trull Foundation toward the publication of this book.