WHEN: Not Specified

ACTIVITIES OF WITNESSES: Me, my mother-in-law and my wife and three year old son were sitting on a screened porch on the back of our cabin talking after the long drive up from the Twin Cities. My in-laws built their cabin about three years ago and we've spent many evenings out on the porch listening to the sounds of the forest.

At about 9pm, during a pause in our conversation, we heard what sounded like a whistling call in the woods adjacent to the cabin. Approximately six up-down notes (hard to sescribe whistle in writing). My mother-in-law, a devout bigfoot skeptic, was the first to comment that it was a sound she had never heard before and one that did not sound like a bird. We sat quietly for a moment and heard it again. It sounded fairly close, but exactly how close would be impossible to say. It didn't sound as far away as the road (approximately 150 feet) or the neighbor's cabin (approximately 250 feet. After the second call, we were commenting on how unusual it was and not at all like a bird-like when I heard a return call in the distance. The return call was identical to the closer version, but was perhaps a bit shorter (maybe only four up-down sets of notes). After discussing it later, I found out my wife also heard the return call. After a short while, we heard the whistle for a third and final time with no return call I could identify.

None of us have ever heard the whistle call before nor did we hear it again the following two nights we were at the cabin. We speculated that the whistling could have been the neighbor calling his dog in, but we later found out he was not home that weekend.

The following night was unusually quiet. We didn't hear any noises whatsoever, even from the wetlands to our east. Usually, we can hear ducks, loons, frogs, crickets, etc. We all commented on the unusual quietness of that night.

Also, our dogs were reluctant to go on walks. Especilaly the older one who had to be dragged off the front porch and who continuously pulled back in the direction of the cabin.