"Heroes, Villains and Cows" was a deleted song from Home on the Range sung by the Mariachi Butterflies, who were to serve as narrators before being scrapped. It was originally going to be the opening, but "You Ain't Home on the Range" was chosen at the last minute for the final version of the film. The song also uses live-action footage from various silent era westerns with the butterflies animated over them.
Mariachi Butterflies: (laughing)
Mariachi Butterfly #1: ¡Vamonos!
Mariachi Butterfly #2: Join in, everybody!
Mariachi Butterfly #1: Gather round, señorita, señor
It's the moment you've all been waiting for
Mariachi Butterflies: Pack your troubles and worries away
and we'll play you a sweet serenade
Mariachi Butterfly #2: It's a tale of the wild and woolly west
So sit back and prepare to be impressed
Mariachi Butterflies: 'Cause we've packed it with more than enough
of the stuff of which legends are made
Heroes and Villains
Mariachi Butterfly #2: An exciting stampede and incredible thieves
Mariachi Butterfly #1: Also-
Mariachi Butterfly #2: Life from the prairies and outlaws and cowboys
So gather around in the camp 'cause the sun is going down
Mariachi Butterflies: And there's more than just heroes and villains
Mariachi Butterfly #2: Desperadoes and rangers and all kinds of dangers
Mariachi Butterfly #1: And not to forget-
Mariachi Butterfly #2: Also gunslinging strangers who mulcting to town
Mariachi Butterfly #1: But especially cows
Mariachi Butterfly #2 (Humberto): Wait a second, Jorge. Did you say cows?
Mariachi Butterfly #1 (Jorge): Sí, Humberto, cows. Fantastic heroic cows.
Humberto: Do they stampede?
Jorge: No. But through their pursed severe and bravery, they did things that will shock and amaze you.
Humberto: How cows stampede?
Jorge: I can see I will have to tell you the story myself.
Humberto: What kind of cows doesn't stampede?
Mariachi Butterflies: Heroes and Villains
Humberto: Pioneers and vaqueros and wild pistoleros
Jorge: And also the cows
Humberto: And the busting of broncos and the mighty frontier
And the most and the moment for a start
Jorge: But it's more than just
Mariachi Butterflies: Heroes and villains
Humberto: It's the whole enchilada
from here to Nevada
Jorge: The cows
Humberto: Don't you worry,
we living another
Humberto: The cigarettes, the guns-
Jorge: The cows!
Humberto: deaths and fates
Mariachi Butterflies: And the most important part, heroes and villains...
Jorge: And cows