Park

Today when I was at going down to the park, it was cloudy and wet.
When I was out on the breakwater, I saw a sea gull on a post in the water and some ducks in the water.
When I was on the sea walk by sage beach, I saw some shorebirds on sage rock.
When I was at the battle site bench, it was high tide.
When I was on the trail by the trail by the river, I saw a raven that looked like it was eating something, but when it saw me it flew into a tree then flew off.
When I was on the trail by the river, I saw some ducks and swans out on the other side of the river. While I was walking on the trail by the river, I saw a flicker so I got out my camera to try to get some photos of it. It kept on moving and the lighting wasn’t right so all my photos ended up blurry. Eventually it flew off, and I looked for it but I couldn’t find it again.
When I was looking for the flicker, I saw a winter wren on the side of a tree.
What was the raven eating?
Why was the wren on the tree?
Why are most of the ducks always on the other side of the river?