Swainson's thrush
Chapter 7: When to Sing, and How
Subchapter: How birds go to roost and awake: Awaking
From page 110 in the book.
♫461. Before contributing their songs to the dawn chorus, these thrushes awake with calls, typically matching the nuances of calls from other Swainson's thrushes in the neighborhood. May 22, 2009. South Slough National Estuarine Research Reserve, Charleston, Oregon. (2:10)