Western kingbird, eastern kingbird, Couch's kingbird
Chapter 8: How Songs Change over Space and Time
Subchapter: Song changes over evolutionary time
From page 149 in the book.
Western kingbird Photo by Brian E. Small
Eastern kingbird Photo by Robert Royse
Couch's kingbird Photo by Brian E. Small
♫612. Eastern kingbird: Eastern kingbirds at dawn sputter and stutter sharply, t't'tzeer, t't'tzeer, t't'tzeer, t't'tzeer, t't'tzeer, eventually exploding into a t'tzeetzeetzee. May 28, 2012. Whately, Massachusetts. (4:02)
♫613. Western kingbird: The western kingbird at dawn repeatedly stutters a kip kip kip ki-PIP, eventually exploding into a ki-PEEP-PEEP-PEEP-PEEP. June 7, 2008. Lake Scott State Park, Scott City, Kansas. (3:13)
♫614. Couch's kingbird: Dawn singing of the Couch's kingbird. Hear the stuttered phrase? The climax? April 7, 2013. Chaparral Wildlife Management Area, Artesia, Texas. (2:05)
♫615. Couch's kingbird: A good half hour of dawn singing from that Couch's kingbird in ♫614. 6:32 to 7:04 a.m. Sunrise at 7:21 a.m. April 7, 2013. Chaparral Wildlife Management Area, Artesia, Texas. (31:51)