I just read an article in Covey Rise, magazine, by the way I highly recommend it as a source reporting on quail hunting and quail habitat research, which reports that for a sustainable quail population, you need somewhere between 2500@ and 5000@, and a population of at least 800 birds. In most parts of the quail range, this requires the cooperation of several different landowners to achieve the dynamic, and there in lies the rub.