somewhere buried deep in this thread are a bunch of ways I put up to deter hawks. They all don't hurt... but help? Not if the hawk is hungry enough.
The best thing I have found is having crows and ravens around. They harass the hawks for me.
some of the hawk annoyances
Fly the American flag. The flapping in the wind seems to keep them away
Scarecrow, moved daily and leave a radio on with talk radio playing
IF they are legal in your state, fire off fireworks
The best thing I have found is having crows and ravens around. They harass the hawks for me.

some of the hawk annoyances
Fly the American flag. The flapping in the wind seems to keep them away
Scarecrow, moved daily and leave a radio on with talk radio playing
IF they are legal in your state, fire off fireworks