Pacific wren
Chapter 3: Why and How Birds Sing
Subchapter: What birds hear
From page 42 in the book.
Photo by Brian E. Small
♫132. An 8-second song, sounding rather shrill and percussive, our ears registering a blurred barrage of high-pitched notes. June 14, 2009. South Slough National Estuarine Research Reserve, Charleston, Oregon. (0:57)
♫133. The same eight-second song first at normal speed, then slowed four times, then eight times, revealing some of the details that the birds themselves no doubt hear. (1:35)