I visited Governors Island on Saturday, given the concert in Central Park. Its a nice place to bird and has a very nice community of birders. And on Saturdays through the end of October, NYC Audubon has a 2:00pm bird walk, with a nice mix of beginning and intermediate birders.
After the walk, along with some other birders, we birded Fort Jay, and found a very nice female type, Blue Grosbeak.