Below are other winter signs of Ruffed Grouse taken last winter - scat and tracks.
In mid June 2014, on a trail in the northern section of Baxter State Park, I must have gotten too close to a nest. One came flying out of the woods at a good clip right toward me. It was fairly low to the ground and my concern was for my legs getting pecked into a bloody mess. I ran and she eventually calmed down enough for me to get the last photo below.