Andreas Oskar Hirsch alias QRVO1 operates under the assumption that birdcalls are in fact coded messages, which we hear as Morse code. Equipped with a recording device, binoculars and a notebook, he investigates what birds in the Baltic might disclose.
SDC_2014 QRVO1: What the heck are they talking about?
You also find an online version of this enterprise here
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