Real-time bird migration

Bird migration over the contiguous US as detected by the NEXRAD weather radar network

Times are in Coordinated Universal Time (UTC). Operational radars indicated by green dots (.), offline radars by red dots (.)

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Bird data extracted by the vol2bird algorithm, see Dokter A.M., Liechti F., Stark H., Delobbe L., Tabary P., Holleman I. Bird migration flight altitudes studied by a network of operational weather radars. J. R. Soc. Interface, 8, 30–43, 2011, DOI: 10.1098/rsif.2010.0116