For 12 seasons I hunted my uncles woods up in WI. I took 12 deer out of those woods and everything stopped on the 13th hunt.
That morning I started out for the blind and hour before light. I've walked that foot trail thru the woods many times over the years. I've seen and heard every critter that lived in the area and none has ever made my skin crawl until the 13th hunt. About 3/4's of a mi from the cabin I heard footsteps to my right. I never gave it no mind and kept going. About 150 yards from the blind this thing on my right gave out some kind of blood curdling cry of some kind. I kept going. About 50 yards from the blind the cry came from my back. I turned on my mag light and the woods became light up like daylight. 6 C batteries light the woods and I did a 180 and seen nothing. I shined my light up into the trees and nothing. All I know is that each time it gave out it's cry the hair on the back of my neck stood at attention. Never seen a deer that year much less put one in the freezer. To this day non of the farmers can say what it was that scared the crap out of me. Never heard it after that.
You heard mine. I'm sure there are more.