Previous update
Update 4/29: I had hoped that the hatchlings would start to
venture out into the open today, but it hasn't happened yet. The
picture below is pretty interesting. I watched this guy try without
success to get fed for about thirty seconds. I know sometimes bird
parents won't feed one of their hatchlings, to insure that the the
strongest ones get enough to survive. But I don't know whether
Mourning Doves do this or not. This one looks smaller
than the bird in the Thursday 4/27 picture. Three hatchlings is
unusual for these birds, but not rare.
Since it's the weekend, I was home when the parents swapped places in the afternoon. That is an active feeding time, so I was able to take a picture with a regular digital camera. I had to hide in the doorway to avoid startling them, but I was able to turn up one interesting image:
I found a couple more interesting references on Mourning Doves. Here is one by some folks in Florida. Here is a page from the State of Pennsylvania.
I went poking around the Pennsylvania site, and looked at the page on hummingbirds. It offered this peculiar bit of advice:
Don't hang your feeder near an electric fence with wire attached to red or yellow post insulators. Hummers are attracted to the insulators and can be electrocuted if they touch the charged fence and metal fence post simultaneously.
They recommend painting the insulators black. So, now you know. If you're planning to hang a bird feeder near an electric fence, there's a right way and a wrong way to do it. And you probably shouldn't mention any of this to the folks at Fox TV.
Update 4/30: I figured out a way to mount the Kodak DC260 outside and operate it indoors from the laptop. When the father left the nest for a few moments, I was able to take this picture. Looks like three healthy doveoids to me.
Feeding time: 
Update 5/1: Drama this morning. Another Mourning Dove flew directly into the nest, and apparently it wasn't the father. Mother lunged at it, and it flew away immediately. But it returned a few minutes later, and perched on the balcony rail. The mother dashed right off to chase it away, and quickly returned to the nest.
Feeding Frenzy:
