The BirdCast project was created by grants from the National Science Foundation and supported by additional grants from Leon Levy Foundation. Rose Postdoctoral Fellowship, and Amazon Web Services. Support for this research came from NASA, Edward W.
The migration traffic rate indicates the number of birds per hour that fly across a one kilometer line transect on the earth’s surface oriented perpendicular to the direction of movement of the birds.Ĭornell Lab of Ornithology currently produces these maps. the Rockies) have obstructions that restrict radar coverage, providing the appearance of no migration where migration may be occurring.īrighter colors indicates a higher migration traffic rate (MTR) expressed in units birds/km/hour. Note that many radars in mountainous areas (e.g. Green dots represent radar locations for which data are available red dots represent radar locations with no data available. Orange arrows show directions to which birds flew. Areas with lighter colors experienced more intense bird migration. When present, the red line moving east to west represents the timing of local sunset, the yellow line represents the timing of local sunrise. All graphics are relative to the Eastern time zone. Real-time analysis maps show intensities of actual nocturnal bird migration as detected by the US weather surveillance radar network between local sunset to sunrise.
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