There are many variations of this song, several of which were collected by Mary Celestia Parler and are featured in her Ozark Folksong Collection. This is the version I’ve learned.

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Lyrics:
Th’ fox walked out one still clear night
An’ prayed for th’ moon to give him light,
For he had many miles to go that night
Before he reached his home, home,
For he had many miles to go that night
Before he reached his home.

He passed through the farmer’s big green yard,
The ducks an’ the geese were all afeard,
“The best of you will grease my beard
Before I reach my home, home,
The best of you will grease my beard
Before I reach my home.”

He picked up the old black duck by the neck
An’ flung her across his big ol’ back;
The old black duck went quack, quack, quack,
An’ her feet an’ her wings hung down, down,
The old black duck went quack, quack, quack,
An’ her feet an’ her wings hung down.

Old mother Wibble-Wabble jumped out of bed,
Out of the winder she popped her head;
“John, John, the black duck’s gone,
The fox passed through the town, town,
John, John, the black duck’s gone,
The fox passed through the town.

John run up to the top of the hill,
He blowed his horn both loud an’ shrill,
But the fox got the best of the music still,
An’ he got safe through the town, town,
But the fox got the best of the music still,
An’ he got safe through the town.

He carried her homeward to his den
Where he had young-uns nine or ten;
He et her up without a knife or a fork,
And the young-uns picked the bones, bones,
He et her up without a knife or a fork,
And the young-uns picked the bones.