Got any whippoorwills around there Gerry? Not a strange noise, but incessant... and f**ing loud!!!

Minds me... the strangest nocturnal noise I ever heard was by porcupines doing what they do very carefully. A high pitched "heee", increasing in volume and rapidity for four or five minutes until one last, long "heeeee" which trailed off. (I am NOT making this up.) And, this was repeated about every ten to fifteen minutes for an hour before I investigated. Now, whether the noises were what one might first think or whether it was a careless porcupine, I don't know.