I've missed the Sheep Meadow fledglings the last few times I've looked for them. Tonight, I missed them yet again, but I saw one of the parents for about an hour.
While watching the parent, I ran across folks who had seen both of the fledglings earlier in day. I also ran into a couple who had photographed one of them on the railing of a flowerbed on Fifth Avenue at 72nd Street with their iPhone. It was nice to know they were doing well, even if I didn't get to see them.