American goldfinch
Chapter 7: When to Sing, and How
Subchapter: Songs and calls in flight
From page 134 in the book.
Photo by Wil Hershberger
♫546. Call notes in flight, per-CHIK-o-ree, per-CHIK-o-ree. June 15, 2009. William L. Finley National Wildlife Refuge, Corvallis, Oregon. (0:14)
♫547. A male in song flight, with canary-like songs of jumbled twitters and musical phrases, every so often punctuated with the canary's signature sei silieeee call. April 23, 2012. Walsh Road, Au Sable State Forest, Lewiston, Michigan. (0:23)