Duty Calls ...

Nick and I were siting out by the fire star-gazing and heard the more-poke/boo-book call of the Southern Boobook Owl.  (The link has a sound file).  As we listened it became clear that there were two owls calling.  At first they sounded close to each other and then one flew closer to us while the other still called. Our one echoed back with less and less enthusiasm till it sounded very much like a disgruntled beard-mumbling duty response - too funny!