Until today watching the Central Park South Hawks nesting from the street has been like watching paint dry.
All of these behavior changes could be a sign that the eggs have hatched or are about to. We’ll know the answer in a few days.
Update: I received an email from Ben Cacace who was digiscoping (using a digital camera with a telescope) from a nearby hotel at the same time I was photographing from the street. From the higher view, there appeared to be an egg in the nest. So, we’ll need to wait a bit before passing out the cigars.