I learned more about the history of the Unisphere nest. The pair has been at the location for at least five years according to a parks employee. The nest has changed locations, having been on the towers of the NY State pavilion and another location in earlier years. The nest was also on the Unisphere last year, and one of the chicks fell out prematurely and was sent to a rehabilitater but did not survive.
The eyasses woke up and then were very active. I got a report from Richard Fleisher that earlier in the day, one of the young ones had ventured all the way to New Zealand. Should we call branching behavior "globe hopping" at this location?