Purple finch
Chapter 9: Music to Our Ears
Subchapter: More music to our ears
From page 161 in the book.
♫658. Brilliant, highly polished, rich and mellow, bright and lively . . . In flight, he sings continuously; inspection of a sonagram shows that he has a remarkable seven-second song that he repeats four times in this selection. April 8, 2012. Mountain Road, Whately, Massachusetts. (0:35)