Sacred Haven of Debauchery

Yesterday, I went to bed and saw a flock of crows through the window... although it's hard to call it a flock, it was a cloud! And a very large one. They were flying and flying, and eventually landed on the trees behind the house across the street. I don't know where they came from, but I've never seen so many crows before. All the branches of the trees were covered with them.