I went up to Inwood Hill looking for the two fledglings, but could only find one of the parents. Reports are that both fledglings have been exploring the park, and spent most of the week getting mobbed by smaller birds. I hope to have better luck next weekend.
On the way back, I passed by Broadway Bridge. I saw both parents, and one of the fledglings. This is a fun site, since you can see the birds from the Number 1 train platform. Only in New York City.