Hello everyone, I just want to give an update for future reference in case anybody wants information about free ranging quail.
The quail stuck around for about 3 weeks after I released them. They acted very much like the chickens, except the quail stayed under cover for most of the day, only appearing now and then to eat. They paired off and would take dust baths under shaded areas. They were approachable and moderately tame. I never found any eggs, but I'm not sure they were laying yet. For these three weeks, when the covey was together as a group, I noticed about one missing (an unpaired female). She left soon after release, I assume to find a mate. The quail stuck around for a surprisingly long time, acting very much like domestic poultry.
The day before yesterday, the quail moved on. A predator killed my chicken rooster, and after that day, only one pair of quail remained in the yard. I assume after witnessing this traumatic event, the 8 quail decided to split and run for the hills to save themselves. I tried to recapture the remaining pair to shelter them from the predator, but they were so skittish, they eluded me easily and were never seen again.
So, what I have learned from this little experiment is, at least in this specific case, you can free range quail-up to 3 weeks at least-but they will run for it at the first sign of danger. If you can give them a very sheltered habitat away from any possible threats, you might be able to keep them around a little longer. If I were to do it again, I'd have a fully enclosed yard with a garden, tall fences, lots of hiding places and bushes, and pinion them so they can't fly over. I'd keep a close eye out for any predators, and have a large open window facing the garden.
I'm very sad to see my flock go-they were a great joy when I had them. It is such a shame that I've been forced to get rid of them.