They hatched! They've actually been hatched for a while, but there were periods when I didn't see Cecelia (the adult female) or hear any sounds from the nest. I didn't want to say anything, then have to follow up with a "birds are hatched but dead" post - I really don't write avian tragedy.
Thankfully, I don't have to. And it's fun having them out there - the closest thing we have to pets. We see Cecelia less often, but I'm pretty sure she's out finding food.
So now we have four baby birds. Names, anyone?