We got close enough to photograph both the bird and the band, and sent the info along to our banding experts. We got a nifty reply from Christopher A. Nadareski, Section Chief, NYC Environmental Protection:
"Great news! One of three I banded at the Met Life Building on 5/12/2012. Her FWS band is: 1947-03231. Had two siblings (one male and one female)."
More information follows.
A quick look at a map (above) shows the two buildings are not all that far apart.
More info on the tagged Great Egret spotted the same day is here.