The Call of the Pobblebonk.
"Ooh," said Will, " I think I just heard a Pobblebonk!"and he leapt up and rushed out of the back door.He was soon back."Yes! Come and listen!"I reluctantly raised myself from the comfort of the sofa and ventured out into the twilight.
Eastern Banjo Frog or Pobblebonk.
This is what it sounds like...