If you really want to challenging your bird identification skills, try using them at night, when bird calls are less than 100 milliseconds long.
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Aug 2023
Migratory Birds Are in Peril, but Knowing Where They Are at Night Could Help Save Them
Light is a very dangerous, if not so obvious, threat to birds who migrate at night. But researchers are using weather radar to track birds and provide “lights out” forecasts to help keep their paths clear of visual distraction.
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15m 25s
Aug 2023
Using Human-Sized Microphones and Hay Bales, They Unlocked the Mysteries of Bird Migration
For thousands of years, no one truly knew how birds migrated—that is, until a few unlikely pioneers sat in an empty field with hundreds of pounds of kludged together recording gear and waited to hear sounds that no one had ever captured.
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16m 39s