This is the only song I know with a duck-billed platypus in it. Listen out for the line "Mind me platypus duck, Bill":

In Australia there are digeridoos and digeridon'ts. Among the latter is a rude verse about "abos", which has been expurgated from most versions of this song. Strewth!

Incidentally, rumour has it that John Inman once camped by a billabong.