park

Today when I went down to the park for the second time, it was partly cloudy and the sun was setting. When I was by Sage beach, I saw some Seagulls on Sage rock and some other birds out in the water, I didn’t see them all that well because the sun was behind them. When I was nearing the Battle site bench, I heard some Black oystercatcher and a Winter wren. I saw the Black oystercatchers out on the beach, along with some Crows, and I saw a winter wren on the rocks at the start of the beach. The Crows were flying up and dropping somethings back onto the beach. When I was at the Battle site bench, It was almost high tide, and I saw some Crows out there too. When I was on the trail by the river, I saw some ducks. When I was nearing the end of the park it was getting harder to see in there, but it wasn’t hard to see once I got out of the trees.
Why do the clouds turn colors when the sun is setting?
Why were the crows flying up and dropping things on the beach?
Why was the winter wren on the rocks?