Bulletin United States National Museum, 1914 (Classic Reprint)
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Hersteller: | Forgotten Books (Museum, United States National) |
Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from Bulletin United States National Museum, 1914 The present study of the Caprimulgine genus Chordeiles found its origin in the attempt to identify the nighthawks of Texas. It soon became evident that nothing short of a thorough revision of the two North American species, Chordeiles virginianus and Chordeiles acutipennis, would produce anything like satisfactory results. This was finally undertaken, partly at the instance of Mr. Robert Ridgway; and the only other species of the genus, Chordeiles rupestris, has been included for the sake of completeness. By reason of the complicated and almost infinite variations due to sex, age, individuals, and geographic areas, the present group is one of the most difficult of all North American birds; and its elucidation has involved the expenditure of an incredible amount of time and labor. The material available consists altogether of 1,165 specimens, including the types of most of the valid forms (excepting Chordeiles virginianus virginianus, Chordeiles virginianus aserriensis, Chordeiles virginianus minor, Chordeiles acutipennis acutipennis, Chordeiles acutipennis exilis, and Chordeiles rupestris rupestris), and of one synonym, Chordeiles gundlachii Lawrence. These specimens are distributed among the three species as follows: Chordeiles virginianus,, 780; Chordeiles acutipennis, 379; Chordeiles rupestris, 6. 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.
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