Do both male and female tend the chicks? i.e. is there another parent with the chicks while this one keeps watch? Or is this an covey of adults with one bird on sentry duty?
I usually try not to disturb them, but it’s interesting to watch the parent fake a broken wing and try to lure you away if you are heading towards the chicks. The closer you get to the chicks, the bigger the show they put on – sort of reverse of children playing “hotter / colder”. Then, when you’ve be led away, they explosively take flight and glide to cover (away from the chicks).