Tonight, we couldn't find the fledgling at St. John until close to sunset.  It has been on St. Luke's Hospital's clock tower, and flew across to the Cathedral.  We've yet to hear the fledgling cry out, and since it is using the building tops to perch, we don't get the auditory clues we'd expect to get from robins, jays and mockingbirds.  Keeping track of this fledgling is going to be a challenge.