Not predators, they don't hunt hawks, they just not afraid to fight them on the ground. A predator is cautious about getting hurt because if they can't hunt they can become the prey to others or they may starve.
If you take away a hawks element of suprise and their impact from a flying hit or grab and set them on the ground, a adult turkey or flock of guinea hens is their better and will whoop their feathered butt!
Owls are a different story as the hunt mainly at dark when your roosting bird is helpless. They just walk up and kill them.