park

Today when I went down to the park for the second time, it was cloudy and it rained on and off.
When I was walking out on the breakwater, I saw a crow walking along on the railing.
When I was out on the breakwater, I saw a few sea gulls out on the water and someone with a dog out on that thing that I thing sometimes holds small fish.
When I was near the park, I saw a red breasted sapsucker on the other side of the road on a small tree.
I also saw a raven on the beach.
When I was at the battle site bench, it was sort of high tide but there was still a bit of beach, and I saw some sea gulls out by the water on the beach.
When I was on the side trail near the trail by the river, I saw some sea gulls and two buffleheads.
When I was on the trail by the river, I saw some ducks on the other side of the river.
I also saw a song sparrow and a chickadee on the side of the river I was on.
When I was nearing the foot bridge, I saw that the trail camera was still up in the tree.
When I was by the foot bridge, I saw that some workers had dug a line across the trail by the bridge and someone was poring something into it.
When I was on my way back home, I saw an eagle up in a tree.
Why did they dig a line there?
Why was that one person out on that thing?
Why was the crow walking along the railing?