Project Gutenberg 2011-10-31 Public domain in the USA. 213 Lowery, George H., Jr. 1913 1978 Lowery, George Hines, Jr. 51062488 A Quantitative Study of the Nocturnal Migration of Birds Produced by Chris Curnow, Tom Cosmas, Joseph Cooper, The Internet Archive for some images and the Online Distributed Proofreading Team at http://www.pgdp.net "A Quantitative Study of the Nocturnal Migration of Birds" by George H. Lowery Jr. is a scientific publication written in the mid-20th century. This work investigates the nocturnal migration patterns of birds through quantitative analysis, addressing previously unexamined aspects of avian behavior during migration. The study proposes to gather substantial data that will lend clarity to various hypotheses surrounding bird migration, focusing primarily on aspects such as flight densities, direction, and the influences of environmental factors. The opening of the study introduces the intriguing phenomenon of bird migration at night, highlighting the lack of comprehensive understanding in the field. Lowery outlines the various circumstantial observations that indicate migratory activity, such as sightings of birds on stormy nights and incidents of collisions with tall structures. He articulates the need for a structured, quantitative approach to accurately measure flight densities and their variations. Through telescopic observations focused on the moon, data collection was conducted over several nights, providing a rich dataset that aims to elucidate the nature of nocturnal migration and the variables influencing it. The introductory sections set the stage for an ambitious analysis intended to fill gaps in existing ornithological knowledge regarding nighttime bird movements. (This is an automatically generated summary.) http://book.klll.cc/files/37894/37894-h/images/cover.jpg Reading ease score: 58.3 (10th to 12th grade). Somewhat difficult to read. en Birds -- Migration QH Text Animal Animals-Wild-Birds Category: Science - Biology Category: Nature/Gardening/Animals 305269 2025-08-15T10:54:16.537626 text/html 304562 2011-10-31T14:44:58 text/html 1746920 2025-08-15T10:54:28.036537 application/epub+zip 1755855 2025-08-15T10:54:20.323563 application/epub+zip 127318 2025-08-15T10:54:17.029596 application/epub+zip 2710111 2025-08-15T10:54:31.270527 application/x-mobipocket-ebook 2723723 2025-08-15T10:54:24.819576 application/x-mobipocket-ebook 226854 2022-09-17T10:32:43.712174 application/x-mobipocket-ebook 244929 2025-08-15T10:54:15.772610 text/plain; charset=us-ascii 244734 2011-10-31T14:44:58 text/plain; charset=us-ascii 244923 2011-10-31T14:44:58 text/plain; charset=us-ascii 20980 2025-08-15T10:54:31.418522 application/rdf+xml 11815 2025-08-15T10:54:17.129587 image/jpeg 2420 2025-08-15T10:54:17.076593 image/jpeg 83213 2011-10-31T14:45:04 application/octet-stream application/zip 2011479 2011-10-31T14:45:04 application/octet-stream application/zip 83156 2011-10-31T14:45:04 application/octet-stream application/zip 2018155 2025-08-15T10:54:16.665587 application/octet-stream application/zip 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 en.wikipedia