At 5:13PM DL is on 50 Fremont looking for the next meal. They still have to keep 4 birds fed. Total time I spent there, 8hours, total distance walked, 8.6 miles. And I had it easy, Sutro stayed in sight almost the entire time, only disappearing onto the low roof behind the parapet for short intervals. It wasn't until 7:30 or so that he decided to fly and then the real challange occurred for the other watchers.