This is how it happened.  The nest is on my front porch and I walked out there.  Momma bird came through an openning in the rose vine and made a very impressive high speed turn just below the nest.  She was chirping.  All of the baby birds followed her as she transitioned from the vine to the open air between the house and the pecan tree.  They flew.  They flap, flap, flapped themselves to a perch on the lowest, closest branches.  After a brief pause they flew together to a higher more interior perch ... then they flew across the yard to an oak tree.  They followed their mother bird back and forth between the trees for a while before the flew across the driveway and in to the neighbor's peach tree ... where another back and forth took place.  Then they disappeared heading towards the next neighbor's trees.  The nest sits empty ... sweet memories remain.