Cedar waxwing
Chapter 6: Song Learning Often Creates Complex Songs and Large Repertoires
Subchapter: What? "Songbirds" with no song?
From page 104 in the book.
Photo by Marie Read
♫445. The bzee note, used by a female when demanding food from her mate (or, in older language, "begging for" food from her mate). June 25, 2012. Westmanland, Maine. (0:59) Recorded by Janet Grenzke.
♫446. Just before flying (at 0:08), waxwings often shift from their bzee note to an intense seee. June 14, 2009. William L. Finley National Wildlife Refuge, Corvallis, Oregon. (0:10)