How about this one from way back in the 50's? (Goes to the tune of The garden where the praties grow)

Have you ever been to London, lads? Well, listen to me tale,
I landed in Trafalgar Square and ende up in gaol!
They thought I was a squatter that had come to ban the bomb,
But I'm only a racing pigeon, and me name is Polly Von.

Canon Collins, Michael Osborne, Shelagh Delaney were there as well,
Trying to stop the nonsense that'll blast us all to Hell.
Just then a rousing cheer went up, so I quickly fluttered down,
Where I had me wing shoved up me back by an officer of the Crown!

Next morning, then, in Bow Steet, up before the magistrate.
He said to me, "Me feathered friend, you're in a sorry state.
You're charged with spotting on the Force, 'tis true, and that's no lie,
And with causing active fallout to come dropping from the sky!"

Now, thogh I'm only a racing pigeon, how I wish I was fat and white,
With an olive branch stuck in me gob, and setting wrong to right.
I'd show these human people that, instead of dropping bombs,
They should be standing in Trafalgar Square and only dropping crumbs!

Steve