As of today the young are 31 (Casper), 34 (Byron) and 35 (Marla). They are getting close to taking their first flights, males likely to go first given their smaller size, Ms. Marla likely to go a bit later than her brothers. Last year our first male fledges took place at 39 and 40 days, but as you know Peregrines are anything but predictable.
There are still reports of at least one non-resident falcon being seen around the building, but no additional identity info has been obtained.