Welcome to Pigeon-Talk and thank you so much for assisting this bird. There is the Wildbird Fund in NYC: http://www.wildbirdfund.com/ and also search here for Pesek .. that would be Dr. Linda Pesek who is an avian vet with a special fondness for pigeons. She may be more in your area. We also have a rehabber or two here on the board that are in the greater NYC area.
Terry
Terry