Western tanager, scarlet tanager, summer tanager
Chapter 8: How Songs Change over Space and Time
Subchapter: Song changes over evolutionary time
From page 147 in the book.

Western tanager Photo by Marie Read

Scarlet tanager Photo by Wil Hershberger

Summer tanager Photo by Marie Read
WESTERN TANAGER
♫599. Western tanager: Daytime singing, with discrete songs and significant pauses between them. May 26, 2009. Prairie City, Oregon. (6:53)
♫602. Western tanager: Slowed dawn singing, but continuous, each song phrase now standing alone, with the pit-er-ick call interspersed. Red-breasted nuthatch at 5:50. June 13, 2009. Malheur National Wildlife Refuge, Burns, Oregon. (6:13)
SCARLET TANAGER
♫600. Scarlet tanager: Daytime singing, with discrete songs and significant pauses between them. With indigo bunting, and a second scarlet tanager in the background. May 8, 2012. Land Between the Lakes, Kentucky. (3:15)
♫601. Scarlet tanager: Slowed, continuous dawn singing, with chip-burr call. Hear the purple martins' dawn singing in the background. June 1, 2010. Mammoth Cave National Park, Kentucky. (2:15)
SUMMER TANAGER
♫603. Summer tanager: Daytime singing, with discrete songs and significant pauses between them. In the background are white-eyed vireo, yellow-throated vireo, yellow-breasted chat, and more. May 9, 2012. Land Between the Lakes, Kentucky. (9:51)
♫604. Summer tanager: Slowed, continuous dawn singing, but without this species' characteristic pit-i-tuck call note. May 25, 2004. Ferne Clyffe State Park, Goreville, Illinois. (4:29)
♫605. Summer tanager: The pit-i-tuck call note, isolated from song, given when bird appears agitated. May 31, 2008. Ellington, Missouri. (2:32)