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Practical Value Of Birds
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Book Synopsis The Practical Value of Birds by : Junius Henderson
Download or read book The Practical Value of Birds written by Junius Henderson and published by . This book was released on 1913 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Practical Value of Birds (Classic Reprint) by : Junius Henderson
Download or read book The Practical Value of Birds (Classic Reprint) written by Junius Henderson and published by Forgotten Books. This book was released on 2016-09-14 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Practical Value of Birds Because of the fact that some species of insects and other pests which are normally kept within reasonable bounds, may, during especially favorable seasons or cycles of seasons increase so rapidly as to become very harmful, those birds which take a mixed diet are particularly valuable. Thus a bird species which ordinarily is largely vegetarian lives through seasons of scarcity of insects, and then is ready to turn its attention to an insect diet whenever the insects become overabundant; whereas, if the birds were all exclusively insectivorous, comparatively few would survive seasons unfavorable to ia sects and thus be on hand to aid in the warfare against these pests when seasons favorable to insect life occur. A species which is harmless, or even beneficial, in its natural habitat, may become injurious when transported to a new environment, where the natural checks upon its increase are wanting, or the lack of its natural food, or the presence of a food which is more enjoyable, may cause a marked change in its food habits. It is said that the Skylark, green linnet and black thrush are considered beneficial in Europe, where they are native, but in New Zea land, into which country they have been introduced, they have developed traits which render them far from desirable additions to the fauna of that It will be interesting to watch the effect of the introduction of the Little Gray Owl into New Zealand for the purpose of fighting the English sparrow Such importations are now, as a result of disastrous experience, prohibited by law in some countries, including the United States. The introduction of a species may disturb the balance as much as the extermination of one. European rats, accidentally introduced into Jamaica, became a great nuisance. The Indian mongoose was imported to destroy the rats. It turned its attention to game birds, poultry, young pigs and lambs, and became a great pest, also destroying many birds, snakes and lizards, which feed largely upon insects. This was followed by an increase of insect pests. Disaster also followed the introduction Of the mongoose into Hawaii, and its importation into the United States was barely prevented. Rabbits. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Book Synopsis The Practical Value of Birds. By Junius Henderson by : University of Colorado (BOULDER, Colorado)
Download or read book The Practical Value of Birds. By Junius Henderson written by University of Colorado (BOULDER, Colorado) and published by . This book was released on 1913 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Practical Value of Birds written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Feeding Wild Birds in America by : Paul J. Baicich
Download or read book Feeding Wild Birds in America written by Paul J. Baicich and published by Texas A&M University Press. This book was released on 2015-03-30 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, according to the US Fish and Wildlife Service, more than fifty million Americans feed birds around their homes, and over the last sixty years, billions of pounds of birdseed have filled millions of feeders in backyards everywhere. Feeding Wild Birds in America tells why and how a modest act of provision has become such a pervasive, popular, and often passionate aspect of people’s lives. Each chapter provides details on one or more bird-feeding development or trend including the “discovery” of seeds, the invention of different kinds of feeders, and the creation of new companies. Also woven into the book are the worlds of education, publishing, commerce, professional ornithology, and citizen science, all of which have embraced bird feeding at different times and from different perspectives. The authors take a decade-by-decade approach starting in the late nineteenth century, providing a historical overview in each chapter before covering topical developments (such as hummingbird feeding and birdbaths). On the one hand, they show that the story of bird feeding is one of entrepreneurial invention; on the other hand, they reveal how Americans, through a seemingly simple practice, have come to value the natural world.
Book Synopsis Why Birds Matter by : Çagan H. Sekercioglu
Download or read book Why Birds Matter written by Çagan H. Sekercioglu and published by University of Chicago Press. This book was released on 2016-08-24 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: For over one hundred years, ornithologists and amateur birders have jointly campaigned for the conservation of bird species, documenting not only birds’ beauty and extraordinary diversity, but also their importance to ecosystems worldwide. But while these avian enthusiasts have noted that birds eat fruit, carrion, and pests; spread seed and fertilizer; and pollinate plants, among other services, they have rarely asked what birds are worth in economic terms. In Why Birds Matter, an international collection of ornithologists, botanists, ecologists, conservation biologists, and environmental economists seeks to quantify avian ecosystem services—the myriad benefits that birds provide to humans. The first book to approach ecosystem services from an ornithological perspective, Why Birds Matter asks what economic value we can ascribe to those services, if any, and how this value should inform conservation. Chapters explore the role of birds in such important ecological dynamics as scavenging, nutrient cycling, food chains, and plant-animal interactions—all seen through the lens of human well-being—to show that quantifying avian ecosystem services is crucial when formulating contemporary conservation strategies. Both elucidating challenges and providing examples of specific ecosystem valuations and guidance for calculation, the contributors propose that in order to advance avian conservation, we need to appeal not only to hearts and minds, but also to wallets.
Book Synopsis The Audubon Society Guide to Attracting Birds by : Stephen W. Kress
Download or read book The Audubon Society Guide to Attracting Birds written by Stephen W. Kress and published by Comstock Pub Assoc. This book was released on 2006 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical, comprehensive, and thoroughly illustrated guide to attracting birds to any property.
Book Synopsis Bulletin by : California. Fish and Game Commission
Download or read book Bulletin written by California. Fish and Game Commission and published by . This book was released on 1912 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Birds in Our Lives written by Adam Davis and published by Cognella Academic Publishing. This book was released on 2012-07 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an excellent text for introductory through junior level avian biology courses. It will also be of interest to anyone choosing a bird as a pet, as well as those involved in hobbies such as falconry and pigeon-racing.
Book Synopsis Bird Census Techniques by : Colin J. Bibby
Download or read book Bird Census Techniques written by Colin J. Bibby and published by Academic Press. This book was released on 2012-12-02 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wild birds are counted for a wide variety of reasons and by a bewildering array of methods. However, detailed descriptions of the techniques used and the rationale adopted are scattered in the literature, and the newcomer to bird census work or the experienced bird counter in search of a wider view, may well have difficulty in coming to grips with the subject as a whole. While not an end in itself, numerical and distributional census work is a fundamental part of many scientific and conservation studies, and one in which the application of given standards is vital if results are not to be distorted or applied in a misleading way. This book provides a concise guide to the various census techniques and to the opportunities and pitfalls which each entails. The common methods are described in detail, and illustrated through an abundance of diagrams showing examples of actual and theoretical census studies. Anyone with a bird census job to plan should be able to select the method best suited to the study at hand, and to apply it to best effect within the limits inherent in it and the constraints of the particular study. The Royal Society for the Protection of Birds and the British Trust for Ornithology have for many years pioneered the collaboration of amateurs and professionals in various census studies. Three members of their staff, each with extensive field experience, now pool the knowledge of these investigations to lay the groundwork for sound census work in future years.
Book Synopsis Birds and Habitat by : Robert J. Fuller
Download or read book Birds and Habitat written by Robert J. Fuller and published by Cambridge University Press. This book was released on 2012-11-08 with total page 555 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesises important concepts, patterns and issues relating to avian habitat selection, drawing on examples from Europe, North America and Australia.
Book Synopsis Some Common Birds Useful to the Farmer by : Foster Ellenborough Lascelles Beal
Download or read book Some Common Birds Useful to the Farmer written by Foster Ellenborough Lascelles Beal and published by . This book was released on 1918 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: "From a purely practical point of view the most important of the relations of native birds to man are the economic. The esthetic value of birds is great -- greater, indeed, than that of any other group of animals; and that this is a real and especially a treasured value is not to be denied. But it is in their relation to insect and other enemies of crops that birds are most directly associated with the welfare of mankind, and their value in this particular should be made as widely known as possible. This bulletin is one of a series designed to assist in doing this. Not all birds are beneficial and all facts tending to show in which class each species belongs will be set forth. the useful kinds far outnumber the injurious, however, and so great is their value as insect destroyers in the United States that to them may be given the credit of being on e of the greatest controlling factors in limiting the development of insect pests and in preventing many disastrous outbreaks. In the following pages are discussed the habitat, food habits, a nd relation to agriculture of more than 50 species of birds common to farming sections."--Page 2
Download or read book Yearbook of Agriculture written by and published by . This book was released on 1929 with total page 1156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Local Bird Refuges by : Waldo Lee McAtee
Download or read book Local Bird Refuges written by Waldo Lee McAtee and published by . This book was released on 1937 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Bibliography on the Food Habits of North American Blackbirds by : Frederick T. Crase
Download or read book Selected Bibliography on the Food Habits of North American Blackbirds written by Frederick T. Crase and published by . This book was released on 1975 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bibliography lists 261 references on the food habits of nine North American blackbird species (Icteridae) and on related subjects such as examination techniques, seed dispersal, and sources of bias. The references, which include those published through 1974, are listed alphabetically by author, and brief annotations are given for most of them.
Book Synopsis Manual for Bird Banders by : U.S. Fish and Wildlife Service
Download or read book Manual for Bird Banders written by U.S. Fish and Wildlife Service and published by . This book was released on 1947 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annual Report by : Philippines. Bureau of Science
Download or read book Annual Report written by Philippines. Bureau of Science and published by . This book was released on 1915 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt: