As Stanton points out, modern farming efficiency has hurt quail numbers.
I’ve twice witnessed a red tailed Hawk take a quail.
One pretty much gutted and skinned the bird before takeoff.

I used to have a resident covey on my property; it was nice to hear them calling to regroup for the night. My German Shepherd tried to put the sneak on them more than once.

“When faith is lost, when honor dies, the man is dead” - John Greenleaf Whittier