Monthly Archives: April 2013

Migration in the Rain – Night of April 23-24, 2013

Despite an apparently rainy night, birds were moving in northeast Ohio on the night of April 23-24, 2013. My night flight call monitoring station detected 187 warbler/sparrow frequency calls between 1/2 hour after sunset and 1/2 hour before sunrise. Given … Continue reading

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18 April 2013 – Just Before 23:00 EDT – Cleveland Heights, Ohio

Example of Migrating Bird Flight Calls Detected Using OldBird 21C Microphone

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