Learned this one from my Da thirty years ago here in the States. He always sang it with a Cockney accent.

And now we have the Oo-Ah Bird!
(Audience: The Oo-Ah Bird! Fan-TASTIC!)
The Oo-Ah Bird lays square eggs with sharp corners, and can be recognized by his distinctive cry... "OOOOOOOOOOAHHHHHHH!"

Another local variant was the Ki-Ki bird insted of Kerii bird (Ki-ki-ki-RIST, it's cold around here!)

And of course, the tigron, which, similar to the crocagator, is the meanest creature alive, with the head of a tiger at one end and a lion at the other...
(Audience: 'Ow's 'ee defecate?)
What's that?
(OW'S 'EE DEFECATE?!)
He don't! That's why he's so mean!

-MMM-