I went out on P5 at about 4:30 or so, walked only the middle loop, and I heard it on 3 occasions! I had just listened to teh Saw Whet Owl's "call" on sibleys bird app, and a few minutes later, I heard a sound SO similar I check to make sure I didn't somehow turn the app back on! I was runnig my memo recorder, but it didn't pick it up I don't think. It was not as close as last time. I walked back and forth along the same stretch several times, and heard it again. Every so often I thought I heard a little single "toot" but it may have been my coat or imagination. I ALSO did hear a Barred Owl, but coming from the opposite side of the trail, and IT said a single "hooooooah" twice.