Warbling vireo
Chapter 8: How Songs Change over Space and Time
Subchapter: Each species has its own song
From page 143 in the book.
Photo by Brian E. Small
♫579. The undulating IGGeley, PIGelly, WIGelly, Pig of the eastern warbling vireo. May 3, 2012. Crooked Lake, Belmont, Indiana. (3:53)
♫580. The choppy songs of the western warbling vireo. May 31, 2009. Two Ocean Lake, Grand Teton National Park, Wyoming. (3:17)