Wilson's snipe
Chapter 2: Birds and Their Sounds
Subchapter: Mechanical (non-vocal) sounds
From page 23 in the book.
Photo by Robert Royse
♫68. Winnows, sounding like wuwuwuwuwuwuwuwuwuwuwuwuwuwuwuwu, each wu the result of one wing stroke directing air over the stiffened, outer tail feathers. June 6, 2009. Big Hole National Battlefield, Wisdom, Montana. (1:01)