Quote:
Instinct in respect to raptors may be based on sight only. Also, a calling raptor is not a hunting raptor. A calling raptor is having social problems, talking to kin (chicks to parents or mate to mate) or warning about / against predators.
If your birds hear hawks calling frequently...
Looks like crap but I have a 12' x 6' x 3' pen that is propped up to about a 30 degree angle by placing a tub under one end. When alarm sounded birds retreat to under pen. I also keep feed close to it reducing inclination to roam far from the pen.
I also stand guard when free ranging more...