Oh, Jersey, so sorry to hear of that horrible hawk! It is definitely overstepping it's protected status. I used fishing line over my giant garden one year and it worked well. The crows were very upset with me. Apparently the rules had been that they could be in that area of the yard, so when I made the garden they considered it theirs, and found the corn sprouts delicious. The spider net of invisible stuff was unwelcome, so the next morning at 4 AM! They gathered in numbers and stalked around cawing loudly. They pretty Much leave the gardens alone now, but I don't plant a lot of corn, just in case.
Good luck with the relocation.
Good luck with the relocation.