Janice, I’ve found the following to be a reliable online reference resource on forms:
http://www.volecentral.co.uk/vf/
I don’t see the pattern in question listed under 5-line Stanzas, so I think it’s a nonce form. I’ve had a shot at it.
The Unbearable Koala
First-time tourists, be aware:
it’s wrong to say koala
bear;
but worse, the beast you should prepare
****yourself to meet
****is far from
sweet.
He’s no Rupert, he’s no Teddy;
You wouldn’t want him in your bed; he
sleeps all day, yet none’s more ready —
****and none gladder —
****to void his bladder.
The koala that you fondly cuddle
will pay you promptly with a puddle.
No sooner hold him than a flood’ll
****drench your cell —
****and what a smell!
[This message has been edited by Henry Quince (edited December 04, 2008).]