Rio Bravo musical interlude

This scene with Dean Martin and Ricky Nelson dueting on a nice cowboy song "My Rifle, My Pony, and Me" by Dimitri Tiomkin has a rather implausible but nevertheless humourous harmonica add-on from Walter Brennan. Brilliant stuff.
Whip-poor-will
Notice they mention in the lyrics whip-poor-wills - a common image used lyrically in American music - was in Tammy on the other days posting - in fact the wiki lists these songs that mention it:
"Alone and Forsaken" by the Hank Williams
"As Above, So Below" by the Klaxons
"Back Where I Belong" by Darryl Worley
"Blue Valley Songbird" by Dolly Parton
"Birth of the Blues" by Frank Sinatra
"Cry of the Whippoorwill" by Rhonda Vincent
"Daniel and The Sacred Harp" by The Band
"Deeper than the Holler" by Randy Travis
"Does That Wind Still Blow in Oklahoma?" by Reba McEntire and Ronnie Dunn
"Everybody Ought to Have a Maid" from the musical A Funny Thing Happened on the Way to the Forum
"Gus: The Polar Bear from Central Park" by The Tragically Hip
"Hotter Than Mojave In My Heart" by Iris DeMent
"If the world had a front porch" by Tracy Lawrence
"I Got a Name" by Jim Croce
"I'll Tell the Man in the Street" from the musical "I Married an Angel"
"I'm So Lonesome I Could Cry" by Hank Williams
"Magnolia" by J J Cale
"Midnight in Montgomery" by Alan Jackson
"My Blue Heaven" recorded by Fats Domino, Smashing Pumpkins and others
"Philadelphia Freedom" by Elton John
"Sad Song" by Cat Power
"Songs About Texas" by Pat Green
"So Says the Whippoorwill" by Richard Shindell
"Speed of the Whippoorwill" by Chatham County Line
"Tammy" recorded by Debbie Reynolds and others
"That Sunday, That Summer" recorded by Nat King Cole and others
Title track of the album The Stage Names by Okkervil River
"The First Whippoorwill" by Bill Monroe
"The Whippoorwill" by Keely Smith
"Where The Whipoorwill [sic] Is Whispering Goodnight" by Charlie Poole
"Whippoorwill" by Doug Burr
"Whippoorwill" by Ozark Mountain Daredevils
"Whip-Poor-Will" by Magnolia Electric Co.