Red-winged blackbird
Chapter 2: Birds and Their Sounds
Subchapter: Female song and duets
From page 18 in the book.
Female Photo by Marie Read
Male Photo by Wil Hershberger
♫55. Male songs, in the minutes before the female first appears on the territory in the morning (recording continued in ♫56 below). Note a second male singing in the background (e.g., 0:10, 0:22, 0:50, etc.); hear also how the foreground male changes to a different song at 2:18. May 4, 2017. Atlanta, Michigan. (3:38)
♫56. A little after sunrise, the female has now joined her mate; she calls in the foreground, initially responding with a loud chit-chit-chit-chit call to each of the male's songs heard in the background. She eventually utters her aggressive, descending teer-teer-teer-teer call (at 0:51), probably a notice to other females that they're not especially welcome here. May 4, 2017. Atlanta, Michigan. (6:46)