While Colorado sleeps, thousands or even millions of migrating birds may be traveling overhead. Learn how BirdCast tracks them with weather radar and how turning out lights and treating windows can help.
Read more: https://wildbirdwarble.wordpress.com/
#BirdMigration #BirdCast

The primary reason #BirdCast cuts off at the Canadian border is radar data integration & differences in signal filtering. BirdCast models rely on the U.S. #NEXRAD weather surveillance radar network, which has been calibrated over 23 years to isolate bird movements from weather patterns.

▶️ Warmer colors on the maps correspond to more intense bird migration;
▶️ forecasts show predicted nocturnal migration ~3 hours after local sunset;
▶️ & are updated every 6 hours.

* #BirdCast #Migration forecasts explicitly cover only the contiguous United States.

birdcast.org/migration-to...

Over 500 million birds are migrating south, as seen on local Doppler radar tonight. September 13, 2026. Fall migration is well underway, despite the heat. #birds #radar #birdcast