I hunted quail a few weeks ago in Kentucky.

Wild coveys, scattered on old Farms, and protected by lifelong Kentucky quail hunters.
We only take one on the covey rise.

They do hold pretty tight and you can be quite close to them when the covey goes up, but certainly no stick swishing required to get them to fly.

I always try to approach the Covey in a fashion that will make them fly in the most advantageous way, though I’m not always successful.

When I think I’m getting close, I do make swishing sounds.