park

Today when I went down to the park for the second time today, it was cloudy and a bit rainy.
When I was on the breakwater, I saw some sea gulls and two geese in the water.
When I was in the park, I saw a squirrel run across the trail.
When I was nearing the battle site bench, I saw some mergansers, buffleheads and sea gulls out on the beach and in the water.
When I was at the battle site bench, it was low tide, and I saw some sea gulls out by the water at the edge of the beach.
When I was by a clearing area with a totem pole in the middle of it, I saw that some small trees and some salmon berry bushes had been cut down.
When I was near the trail by the river, I saw some ducks and sea gulls.
When I was on the trail by the river, I saw a swan and a duck on the other side of the river.
When I was on my way back home on the trail/boardwalk by sage beach, I saw two squirrels, one was chasing the other across the tree branches.
Why did they cut down the small trees?
Why was there only one duck and one swan?
Why was the one squirrel chasing the other?