The foster child and the fledgling were both in the same trees they had been the day before when I visited Tompkins Square Park.  What was different was the behavior of the parents.   Both were doing their best to entice both fledglings to leave their respective trees.  Christo, the adult male few around with a pigeon, making multiple passes to entice the youngsters to fly.  Dora made visits too, but without food.  However, both youngsters were content to stay perched in their respective trees.