Vesper sparrow
Chapter 5: More about Song Learning
Subchapter: Song (and call) dialects
From page 67 in the book.
Photo by Wil Hershberger
Dialect 1. ♫291. Listen to the similar introductory whistles among the several males in this recording. June 1, 2009. Grand Teton National Park, Jackson, Wyoming. (3:34)
Dialect 2, 2012-2015.
♫292. One song from each of the following three examples (♫293, ♫294, ♫295); hear how similar the introductory notes are for each male in this dialect area. (0:28)
♫293. Example 1. Two males audible. April 27, 2014. Atlanta, Michigan. (4:24)
♫294. Example 2. One male. April 22, 2012. Walsh Road, Au Sable StateForest, Lewiston, Michigan. (20:08)
♫295. Example 3. One male from 2015, showing how the dialect is stable over at least four years, from 2012 to 2015. April 25, 2015. WalshRoad, Au Sable State Forest, Lewiston, Michigan. (12:08)
Dialect 2, 2018.
♫296. The introductory notes for nine different males. April 26, 2018. Lewiston, Michigan. (0:24)
♫297. One complete song from each of those nine males. April 26, 2018. Lewiston, Michigan. (0:59)