Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog Project Gutenberg 2021-05-05 Public domain in the USA. 173 Lincoln, Frederick Charles 1892 1960 Lincoln, F. C. (Frederick Charles) Lincoln, Frederick C. agr36000014 The Migration of North American Birds (1935) U.S. Department of Agriculture circular no. 363 Tom Cosmas produced from materials made available on The Internet Archive. "The Migration of North American Birds" by Frederick Charles Lincoln is a scientific publication written in the mid-20th century. This work thoroughly examines the patterns, behaviors, and phenomena associated with the migration of birds across North America. It discusses various theories on why and how birds migrate, details about their migratory routes, and the historical context of these natural occurrences. The opening of the book sets the stage by presenting a series of thought-provoking questions regarding the seasonal disappearance and reappearance of migratory birds. It addresses the curiosity about their routes, the dangers they face during migration, and the importance of understanding these phenomena for conservation efforts. Lincoln emphasizes the long history of interest in bird migrations, referencing ancient observations, and he outlines the extensive research conducted by the Biological Survey which provides the backdrop for the book's exploration of avian migration patterns. This introduction establishes a framework for understanding the complexity and significance of bird migrations in North America. (This is an automatically generated summary.) Reading ease score: 58.0 (10th to 12th grade). Somewhat difficult to read. en Birds -- Migration QL Text Category: Science - Biology Category: Nature/Gardening/Animals Category: Environmental Issues 282555 2025-06-26T04:32:33.421032 text/html 243602 2024-10-18T13:35:20 text/html 2163878 2025-06-26T04:32:45.367964 application/epub+zip 2162422 2025-06-26T04:32:37.710027 application/epub+zip 169765 2025-06-26T04:32:34.128065 application/epub+zip 2774483 2025-06-26T04:32:48.858992 application/x-mobipocket-ebook 2733836 2025-06-26T04:32:41.816001 application/x-mobipocket-ebook 214302 2022-09-29T11:20:48.905596 application/x-mobipocket-ebook 211203 2025-06-26T04:32:32.632565 text/plain; charset=us-ascii 191323 2024-10-18T13:35:20 text/plain; charset=us-ascii 16305 2025-06-26T04:32:48.994959 application/rdf+xml 13033 2025-06-26T04:32:34.266018 image/jpeg 2522 2025-06-26T04:32:34.195010 image/jpeg 2277696 2025-06-26T04:32:33.588057 application/octet-stream application/zip en.wikipedia