When was the last time you stopped and really listened to birdsong? Ever wonder what they’re singing about? We chat to <a href="http://www.kaufmanfieldguides.com/">Kenn Kaufman</a> and <a href="https://alexfoundation.org/about/dr-irene-pepperberg/">Dr. Irene Pepperberg</a> about the extraordinary complexity to the avian arias, how they’re produced, what they mean, and how vocal acrobatics can reveal a surprising hidden intelligence. <a href="http://20k.org/">Twenty Thousand Hertz</a> is produced out of the studios of <a href="http://defactosound.com/">Defacto Sound</a>, and hosted by <a href="http://dallastaylor.com/">Dallas Taylor</a>. Follow the show on <a href="http://twitter.com/20korg">Twitter</a> &amp; <a href="http://facebook.com/20korg">Facebook</a>.  Become a monthly contributor at <a href="http://20k.org/donate">20k.org/donate</a>. If you know what this week's mystery sound is, tell us at <a href="http://mystery.20k.org/">mystery.20k.org</a>. Check out <a href="https://itunes.apple.com/us/podcast/the-growth-show/id963131164?mt=2">The Growth Show</a> wherever you get your podcasts. Episode transcript, music, and credits can be found here: <a href="https://www.20k.org/episodes/birdsong">https://www.20k.org/episodes/birdsong</a>  Learn more about your ad choices. Visit <a href="https://megaphone.fm/adchoices">megaphone.fm/adchoices</a>

Voyager Golden Record

A lovingly crafted podcast that reveals the stories behind the world's most recognizable and interesting sounds.