You are sending a link to...
A Duck-Billed-Platypus-related Musical Interlude
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.