Autumn morning flights of migrant songbirds in the northeastern United States are linked to nocturnal migration and winds aloft
作者： Benjamin M. Van Doren , Daniel Sheldon , Jeffrey Geevarghese , Wesley M. Hochachka , Andrew Farnsworth
DOI: 10.1642/AUK-13-260.1
关键词: Sunrise 、 Habitat 、 Winds aloft 、 Geography 、 Morning 、 Climatology 、 Nocturnal
摘要: ABSTRACT Many passerines that typically migrate at night also engage in migratory flights just after sunrise. These widely observed “morning flights” often involve birds flying directions other than those aimed toward their ultimate destinations, especially coastal areas. Morning have received little formal investigation, and study may improve our understanding of how orient themselves during nocturnal movements they use stopover habitat. We studied autumn morning the northeastern United States to identify associations between number undertaking magnitude movements, winds, local topography. Our analyses included observations more 15,000 7 locations. found positive relationships flight size migration density winds aloft: Significantly flew following larger quantified from weather surveillan...
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