Download or read book The Behavioral Ecological and Morphological Characteristics of Two Populations of the Alder Flycatcher written by Robert Carrington Stein and published by . This book was released on 1958 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status Ecology and Conservation of the Southwestern Willow Flycatcher written by Deborah M. Finch and published by . This book was released on 2000 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wildlife Abstracts written by U.S. Fish and Wildlife Service and published by . This book was released on 1954 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report RMRS written by and published by . This book was released on 1998 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolutionary Differentiation in Morphology Vocalizations and Allozymes Among Nomadic Sibling Species in the North American Red Crossbill Loxia Curvirostra Complex written by Jeffrey G. Groth and published by Univ of California Press. This book was released on 1993-08-16 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: The highly variable North American red crossbill complex has presented one of the most controversial problems in avian systematics. Although crossbills wander nomadically and breed all year, they have not become homogenized in bill and body size. This study suggests that this crossbill complex contains several distinctive sibling species that breed sympatrically and show ecological differences.
Download or read book Wildlife Review written by and published by . This book was released on 1958 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neotropical Migratory Birds written by Richard DeGraaf and published by Cornell University Press. This book was released on 2019-06-07 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thrushes, warblers, vireos, and tanagers are probably the most familiar of the Neotropical migrants—birds that breed in the United States and Canada, then journey to spend the winter in the Caribbean, Mexico, or southward. But this extraordinary group actually comprises a large number of diverse species, including waterfowl, shorebirds, terns, hawks, flycatchers, and hummingbirds. In their compendious review of information on these birds, Richard M. DeGraaf and John H. Rappole illuminate the need for a thorough understanding of the ecology of each species, one that exte4nds throughout the entire life cycle. The authors argue convincingly that conservation efforts must be based on such an understanding and carried out across a species' range—not limited to the breeding grounds. This book is the first to summarize in one volume much-needed practical data about the distribution and breeding habitat requirements of migratory birds in North and South America. The body of the book consists of natural history accounts of more than 350 species of Neotropical migrants, including a brief description of each bird's range, status, habitats on breeding grounds, nest site, and wintering areas. The authors provide a complete range map of each species' distribution in the Western Hemisphere as well as notes on the distribution—basic data that until recently have largely been unavailable in usable form to ornithologists and land and resource managers. An appendix lists species that are increasing or decreasing at significant rates in various physiographic regions of North America.
Download or read book New England Wildlife written by Richard M. DeGraaf and published by UPNE. This book was released on 2001 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: The only comprehensive guide to the natural histories and habitats of all inland New England species
Download or read book The Atlas of Breeding Birds in New York State written by Robert F. Andrle and published by Cornell University Press. This book was released on 1988 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: This generously illustrated, easy-to-use reference gives instant information on 238 birds that are native to New York State. The core of the atlas is a series of accounts of each species, each account including a distribution map with possible, probable, or confirmed breeding. Facing each map is an explanatory page of text that covers a number of topics: abundance, historical and current distirbution, habitat, and nest description and location. On the same page is an illustration of the bird, often with its nest and young.
Download or read book Proceedings American Philosophical Society vol 107 no 1 1963 written by and published by American Philosophical Society. This book was released on with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Once a River written by Amadeo M. Rea and published by University of Arizona Press. This book was released on 2021-11-09 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Like many rivers of the arid Southwest, the Gila is for much of its length a dry bed except after seasonal rains. Yet a mere century ago it hosted a thriving biological community, and two centuries ago American Indians fished from its banks. It is no mystery how the desert swallowed up the Gila. Beaver trapping, overgrazing, and woodcutting first ruined natural watersheds, then damming confined the last drops of its surface flow. Historical sources and archaeological data inform us of the Gila's past, but its bird life further testifies to the changes. Amadeo Rea traces the decline of bird life on the Middle Gila in a book that addresses the broader issue of habitat deterioration. Bird lovers will find it a storehouse of data on avian migration patterns and on ornithological classification based on skeletal structure. Anthropologists can draw on its Piman ethnoclassification of birds, which links the Gila River tribe with various other Uto-Aztecan peoples of Mexico's west coast. But for all concerned with protecting our environment, Once a River offers evidence of change that might be apprehended elsewhere. It is a case history of a loss that perhaps need never have occurred.
Download or read book Agriculture Handbook written by and published by . This book was released on 1991 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: Set includes revised editions of some issues.
Download or read book Current Ornithology written by Richard Johnston and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: If it is still true that more than 80% of the ornithologists in North America are primarily interested or engaged in ecological studies on birds (J. R. King and W. J. Bock, Final Report of the Workshop on a National Plan For Ornithology, 1978), then Volume 3 of Current Orni thology is preadapted for their consideration. All but one article in this volume are somehow concerned with the ecological aspects of the bi ology of birds. Variation in the scope of topical coverage is relatively broad, and includes conservation, reproduction, behavior, community structure, and evolutionary ecology. Three reviews concern the pervasive effects of man and industry on various bird populations of the world. Risebrough provides a de tailed description of the relationships between pesticides and bird pop ulations. Morrison ass es ses aspects of bird population numbers as in dicators of environmental change, and Temple outlines current research on endangered species. The broad spectrum of reproductive ecology of birds is variously treated in this volume. Jehl and Murray explore sexual selection and some of the resulting complexities in the evolution of sexual size di morphism, primarily in shorebirds. Lawton and Lawton are concerned with the relationships between social behavior and breeding systems in which variation is found in the age at which reproduction is first undertaken. Oring examines the wide-ranging variation in polyandrous breeding systems in birds, while Rohwer is concerned with adoption versus infanticide in birds, and their relationships to reproductive fit ness.
Download or read book Bottleneck written by William Robert Catton and published by Xlibris Corporation. This book was released on 2009 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecological roots of our toubled time are deeper than its economic manifestations. Anguished posterity will look back on this 21st century as "the bottleneck century." Bottleneck: Humanity's Impending Impasse was written to show how and why three converging trends have put humankind in much deeper peril than is generally acknowledged. First, there are many more of us inhabiting this planet than it can sustain. Second, technological advances of recent centuries have made gigantic and prodigal our per capita resource appetites and our per capita environmental impacts. Third, even though, as the symbol-using species, we humans conceivably could do better at anticipating future circumstances and planning ahead, our evolutionary heritage together with unanticipated dysfunctions of modern division of labor have kept us too preoccupied with short-term concerns. People today are dependent upon a fantastically intricate web of exchange relations ("the market"). Even when functioning normally and not in a collapsed condition, as currently this system of relations has a serious and pervasive dehumanizing effect not adequately discerned by economists nor sociologists. Recognition of and adequate adaptation to the deteriorating ecological context of human life has been impeded. Human societies (even our own) are almost certainly going to act in ways that will make an inevitably difficult future unnecessarily worse. Factors analyzed in this book have made people seriously averse to the kind and extent of cooperation our difficult future will require. Together with the basic trio of disturbing trends humans having become so numerous, so ravenous, and so short-sighted this has made the nature of today's human prospect far more dire than most policymakers dare admit. It tempts even the wisest and most civic-minded to seek or promote "remedial" policies that will worsen the real predicament.
Download or read book Urban Ornithology written by P. A. Buckley and published by Cornell University Press. This book was released on 2018-12-15 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urban Ornithology is the first quantitative historical analysis of any New York City natural area’s birdlife and spans the century and a half from 1872 to 2016. Only Manhattan’s Central and Brooklyn’s Prospect Parks have preliminary species lists, not revised since 1967, and the last book examining the birdlife of the entire New York City area is now more than fifty years old. This book updates the avifaunas of those two parks, the Bronx, and other New York City boroughs. It treats the 301 bird species known to have occurred within its study area—Van Cortlandt Park and the adjacent Northwest Bronx—plus 70 potential additions. Its 123 breeding species are tracked from 1872 and supplemented by quantitative breeding bird censuses from 1937 to 2015. Gains and losses of breeding species are discussed in light of an expanding New York City inexorably extinguishing unique habitats.
Download or read book Bulletin of the New York State Museum of Natural History written by and published by . This book was released on 1887 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
