I got lucky on Monday.  When I arrived at Governors Island, the Red-tailed Parents and a fledgling flew back and forth from the weathervane to the communications tower for about 45 minutes.  It looks like in early August the fledgling is being a pest.  It's time he/she starts to learn to hunt and he/she was looking for handouts.  How this develops over the next few weeks will be fun to watch.

After all of the action was over, I did catch up with one of the adults who was harvesting branches.  I think it was the male.  It looks like he's adding twigs to a different spot on the communications tower.