I caught up with the Peregrine Falcon, born on the Du Bois Library at U. Mass Amherst, again today. She was on 530 West End Avenue for about an hour, took off for about 20 minutes, returned and then went out of sight. She appeared to fly up West End Avenue, but I lost track of her. I heard her call around 89th Street, but couldn’t find her. She might have been perched on a roof out of sight.