I guess I was, thankfully, wrong about the last flyer. Maybe he was sulking about being left all alone for the first time.
 Last year the chicks returned to the nest at night  for a while.
 When trying to spot them you sometimes catch them swooping by in the 
 upper left. Probably an adult with food and making the chicks work for it.
 
 They also changed the cam so we can look back into the nest.