Well, brood #1 has fledged! When I got up Saturday morning the window ledge above the front door was empty and I guessed correctly that the Mourning Dove chicks had flown the coop. At that point one was still on the veranda railing with one of the parents (Mom, I think) trying to get up the nerve to fly to the tree on the front lawn (baby on the left, Mom on the right) .
This "but Mom, I'm scared!" pose lasted at least an hour after I started watching before Mom flew to the tree and left baby alone.
About 20 minutes later baby (above) followed to the same tree.
Dad on the left, baby slightly higher and on the right.
Today Dad has started adding new twigs in anticipation of the next brood......