I was in Washington Square Park for a few hours in the middle of the afternoon.  They fledgling had just been fed  before I arrived and was out of sight. 

However, the parents were doing a good job of keeping a close eye on her.  The father, also kept Kestrel watch and did a good job of being a decoy.  He had managed to keep the Kestrels far away from where the fledgling is located.