ISBN: 9781332128624

[ED: Taschenbuch], [PU: Forgotten Books], Excerpt from The Food of Some British Wild Birds: A Study in Economic Ornithology "Economic Ornithology, or the study of the inter-relation of bi… Plus…

[ED: Taschenbuch], [PU: Forgotten Books], Excerpt from The Food of Some British Wild Birds: A Study in Economic Ornithology "Economic Ornithology, or the study of the inter-relation of birds and agriculture, and an investigation of the foods, habits and plants, is an untrodden and promising field that lies open for investigation by the English agricultural scientist." Earl Cathcart, The Times, May 16th, 1891. The nature of the food of many of our wild birds has hitherto been largely guesswork, for, with the exception of a very few species, no detailed investigations have been carried out, and without these details, obtained in both the field and the laboratory, it is impossible to arrive at any sound conclusions respecting their economic status. In the present investigation upwards of three thousand postmortems have been made of adult birds, and three hundred and twelve of nestlings and the conclusions arrived at have only been obtained after a considerable amount of work extending over many years, during which period numerous observations have been made in the field. It is now universally recognised that birds play a most important part in checking the ravages of various animal pests of our crops, particularly so in the case of insects. Prejudice, ignorance and faulty observation have undoubtedly had much to do with our lack of information in the past, whilst many writers have been, and still are, content, when writing upon the subject, to simply reiterate the statements of earlier authors. Casual observations made in the field, which are frequently put forward in newspaper discussions, are of little value, indeed, they are generally most misleading, as they take no note of what the particular species of bird feeds upon at other seasons of the year, or in other districts, or during 1 the period they are looking after their young. Many birds which are injurious at one season of the year are distinctly beneficial for the remainder. Again, many birds that are beneficial, may, if allowed to unduly increase, become equally injurious. In other cases the partial failure of their natural food supply, or other causes, may lead to a change in their food habits, in a like manner the alteration or removal of their natural environment may lead to equally disastrous results. 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. Versandfertig in 3-5 Tagen, [SC: 0.00], Neuware, gewerbliches Angebot<

ISBN: 9781332128624

Paperback, [PU: Forgotten Books], Excerpt from The Food of Some British Wild Birds: A Study in Economic Ornithology The economic importance of the subject to the agri culturist, the horti… Plus…

Paperback, [PU: Forgotten Books], Excerpt from The Food of Some British Wild Birds: A Study in Economic Ornithology The economic importance of the subject to the agri culturist, the horticulturist, the fruit grower, and the forester, and to all who take an interest in our avian fauna, does not here call for any explanation. 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., Zoology & Animal Sciences<

2015, ISBN: 9781332128624

A Study in Economic Ornithology (Classic Reprint) A Study in Economic Ornithology (Classic Reprint) Buch (fremdspr.) Taschenbuch 04.08.2015 Bücher>Fremdsprachige Bücher>Englische Bücher, … Plus…

A Study in Economic Ornithology (Classic Reprint) A Study in Economic Ornithology (Classic Reprint) Buch (fremdspr.) Taschenbuch 04.08.2015 Bücher>Fremdsprachige Bücher>Englische Bücher, Forgotten Books, .201<

ISBN: 9781332128624

A Study in Economic Ornithology (Classic Reprint) A Study in Economic Ornithology (Classic Reprint) Buch (fremdspr.) Bücher>Fremdsprachige Bücher>Englische Bücher, Forgotten Books

2015, ISBN: 1332128629

Kartoniert / Broschiert SCIENCE / Life Sciences / Zoology / General, mit Schutzumschlag neu, [PU:Forgotten Books]