Ok, I see you are in the desert so the obvious suggestion of tall trees and such is not as viable a solution...and it takes time to mature. but....What kinds of bushes and shrubs are native to your climate? My flock moves from cover to cover (my yard-their range) is bordered by berry vines and lavender that they hide under frankly more than the trees. Maybe there is something you can plant or build that gives the same benefit.
That said. My yard is BORDERED in all kinds of wonderful trees and bushes and such...the vast majority is a wide open field. A field constantly patrolled by hawks and falcons thanks to being displaced by construction. It’s also hot and humid where I am so I covered that space in zig-zagging shade sails. This provides cover and shade. I also got my first rooster. He’s young but already he’s calling out hawks and cat sightings and rushing the hens into the barn or under the coop (which is raised) or into a bush. They have to have somewhere to run too so circle back to suggestion 1 above.
I mean the hawk nets aren’t a bad idea IMO, but maybe this sparks some ideas if you don’t actually want to do that