park

Today when I went down to the park for the second time today, it was cloudy and there was wet snow on the ground. It wasn’t too deep and I wore my shoes.
When I was walking out in the breakwater, some snow had melted from when I was last out there earlier in the day. It was also a bit windy, and I didn’t see the fish that I had seen before.
When I was out at the end of the breakwater, I saw some sea gulls.
When I was at the beginning of the park, I saw a bunch of Varied thrushes on the ground. The varied thrushes flew into the trees when I walked by.
When I was at the battle site bench, it was low tide and it was windy enough that my hood almost got blown off my head. I also saw some sea gulls flying around.
When I was by the trail by the river, I saw some crows out on the beach. I also saw seven swans out near the end of the river in the water.
When I was on the trail by the river, I saw a merganser fly up the river.
When I was on my way back home I saw some ravens.
Why were the Varied thrushes at the beginning of the trail?
Why were the seven swans near the end of the river?
Why did the Merganser fly up the river?