Project Gutenberg 2011-10-31 Public domain in the USA. 68 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://www.gutenberg.org/files/37894/37894-h/images/cover.jpg en Birds -- Migration QH Text Animal Animals-Wild-Birds Browsing: Nature/Gardening/Animals Browsing: Science - General 305311 304901 2024-09-16T05:35:31.146003 2023-09-16T11:56:05.994287 text/html text/html 304562 2011-10-31T14:44:58 text/html; charset=iso-8859-1 2011479 2011-10-31T14:45:04 text/html; charset=iso-8859-1 application/zip 1747997 2024-09-16T05:35:44.676080 application/epub+zip 1757112 2024-09-16T05:35:35.509969 application/epub+zip 128049 2024-09-16T05:35:31.787957 application/epub+zip 2710671 2024-09-16T05:35:48.682905 application/x-mobipocket-ebook 2723723 2024-09-16T05:35:41.003887 application/x-mobipocket-ebook 226854 2022-09-17T10:32:43.712174 application/x-mobipocket-ebook 244929 244771 2024-09-16T05:35:29.831973 2023-09-16T11:56:05.045298 text/plain; charset=us-ascii text/plain 244734 2011-10-31T14:44:58 text/plain; charset=iso-8859-1 83213 2011-10-31T14:45:04 text/plain; charset=iso-8859-1 application/zip 244923 2011-10-31T14:44:58 text/plain; charset=us-ascii 83156 2011-10-31T14:45:04 text/plain; charset=us-ascii application/zip 20411 2024-09-16T05:35:48.837853 application/rdf+xml 11815 2024-09-16T05:35:31.967963 image/jpeg 2420 2024-09-16T05:35:31.871936 image/jpeg 2018922 2024-09-16T05:35:31.370941 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://www.gutenberg.org/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog