It must be from poaching then, because hawks aren't the problem here.
The quail have gone from my property(Missouri was the #1 quail state at one time) due to this.
Now that I keep a tighter grip on the land, I hope they'll return - I've not shot quail there in years, and as a matter of fact, I've changed from upland to waterfowling because of this.
Being right-off the Missouri River, and flyway pushed me in that direction also.
PS The love of Labs too!