Warbling vireo
Chapter 4: How a Bird Gets Its Song
Subchapter: Learned songs of songbirds, and babbling
From page 50 in the book.
Photo by Wil Hershberger
♫162. Adult song, among eastern birds heard (by some) as If I SEES you, I will SEIZE you, and I'll SQUEEZE you till you SQUIRT!. May 31, 2010. Lincoln Homestead State Park, Springfield, Illinois. (2:55)
♫163. Plastic song of youngster, beginning with his characteristic call note. August 10, 2005. Norwottuck Rail Trail, Amherst, Massachusetts. (0:30)