Tennessee warbler
Chapter 4: How a Bird Gets Its Song
Subchapter: Learned songs of songbirds, and babbling
From page 53 in the book.
Photo by Brian E. Small
♫176. Song, repeated over and over, a three-parted ticka ticka ticka, swit swit, sit-sit-sit-sit-sit-sit, becoming louder and faster from one part to the next. June 1, 2016. Cloquet Line, Ely, Minnesota. (1:21)
♫177. Plastic song by spring migrant. May 6, 2012. Ferguson Spring, Land Between the Lakes, Kentucky. (2:33)