Nathan Pieplow[1] wrote the recent The Peterson Field Guide to Bird Sounds series[2]. He delves deeply into the spectrograms of bird songs and calls and describ

Nathan Pieplow[1] wrote the recent The Peterson Field Guide to Bird Sounds series[2]. He delves deeply into the spectrograms of bird songs and calls and describes and names the different features thereof. He offers the basics the basics on his site3[3]. I got to hear him speak recently - pretty interesting stuff. [1] https://earbirding.com/blog/ https://earbirding.com/blog/ [2] http://earbirding.com/blog/book http://earbirding.com/blog/book [3] https://earbirding.com/blog/specs https://earbirding.com/blog/specs