I arrived at the park on Sunday afternoon to find the male sitting in the nest and the female of the pair on top of the Christodora House roof.  They exchanged places on the nest.  The male flew to a nearby tree, and after a brief interval, the male broke off a twig and took it the nest.

He disappeared and then reappeared on a church cross on Avenue B.  The nest has at least two eggs and this young pair seems to understand exactly what they need to do for the next four weeks.