There is the strangest noise outside, that starts up at dark, and goes until about 3 every morning, keeping Momma awake. It is as annoying as when Daddy does that gurgle thing in his nose and throat when he sleeps. They don't know what it is, very loud and it sounds like a cross between a duck honking and some sort of scraping. It happens in groups of 6 or 7, every 20 seconds or so! Momma used ear plugs last night. Any idea on what it could be???