On Sunday at Sheep Meadow, when I arrived it looked like one of the eyasses had fledged.  After about twenty minutes, however it became apparent that there were still two eyasses in the tree, and one had learned to go out on the branches.

Branching is common in tree nests, but I've become so accustomed to building nests, I had forgotten to give the tree a good going over before assuming we had had a fledge!  I think the eyasses hatched around May 1st, so we should have a fledge by the weekend.