The version that uses the tune to Stars and Stripes was a popular record in the 50s--I can't remember who did it. It was a man and wife and I want to say Les Paul and Mary Ford; but I don't think so. Anyway it has a chorus

Be kind to your web-footed friends
For a duck may be somebody's mother
Be kind to the denizen of the swamp
He's a dilly through and through
You may think that this is the end
But its not 'cause there is another chorus

Except at the end you sing

You may think that this is the end
Well it is

Murray