It seems that the female (Allie) at this site didn't want to be left behind, alone in the nesbox. So yesterday afternoon, at approx. 1:40 Calgary, just 3 hrs. after Bert fledged, she decided to "fly the coop".
After some searching, she was found on a ground level area near the Law Bldg., captured, checked out and since she did not appear to be injured, was placed on a lower roof near her nestbox. This morning, the 2 were reported to be doing well, still where they were yesterday and vocally strong. Parents are nearby watching over them.