park

Today when I went down to the park for the second time, it was cloudy and getting dark. When I was out on the breakwater, I saw a sea gull. When I was coming from the end of the breakwater, I heard a Great blue hereon and turned around to look and saw it flying over by the end. When I was in the park, someone wearing a headlamp and had a dog walked by me. When I was at the battle site bench, it was high tide and I saw some lights out on the water. When I was on a side trail by the trail by the river, I saw some sort of bag by the trash can. When I was on the trail by the river, I saw some ducks on the other side of the river. When I was on my way back home, I saw a bright white light out on the water. When I was closer to home, I could see my breath in the air when I was under the street lights.
Why was the hereon flying by the end of the breakwater?
Where was the hereon coming from?
Why could I see my breath?