I can only finish the chorus which goes

Hovering high, high, high, Hovering high in the sky
On a wingbeat you can't see, on a quest to live or die
A kestrel hovers in the sky

Alas I don't know the verses but have heard it sung by one Bob Hamblin at the "Dog Days Festival" with a frequency which suggests ownership.

the-admiral may be able to help if he sees this?