Carolina wren
Chapter 4: How a Bird Gets Its Song
Subchapter: Learned songs of songbirds, and babbling
From page 51 in the book.
♫166. Adult male song, a relatively uninspired performance with 60 songs, all of the same type. May 4, 2012. Honker Lake, Land Between the Lakes, Kentucky. (5:13)
♫167. Adult male song, a more inspired performance; a second song type is introduced at 0:10, a third at 1:56, a fourth at 2:48. After 3:42, he often alternates two different songs. May 16, 2010. Yorktown National Battlefield, Yorktown, Virginia. (11:38)
♫168. Plastic song. This young male bumbles along, with no two songs alike, not even two TEA-KETTLE phrases alike within the same song. Recorded on a "rail trail," complete with bicycle passing (at 0:52). August 10, 2005. Norwottuck Rail Trail, Amherst, Massachusetts. (1:10)