We have a lot of Turkey Vultures here. We live by the woods and on a gravel road, so there is plenty of road kill for them. About two weeks ago it rained and one of the vultures came and sat on the telephone pole by my barn to air out it's wings. My chickens we inside, and they were chattering and the roosters were growing, and the vulture didnt seem to take any interest in them. A few times I have seen as many as 25-30 flying around in circles over the woods.
We have one large hawk that live out in the woods somewhere, and it occasionally comes flying around our yard screeching and screaming. Whenever I see it I just round up the girls and close them in until it goes away. I think the hawks nest is pretty far away from our house, because I only see the hawk maybe 3 times a year.
Where we used to live we had massive amounts of hawks. We never had any get my chickens, but several times they would fly in circles around my barn. We will most likely be moving in the Spring, and I'm really hoping the new house won't have hawks. We are hoping to find a house with a good amount of acerage for more privacy and so we don't have to deal with neighbors who hate my chickens anymore.

I'm sure my noisy rooster labeled us as the "annoying neighbors". We live in the country, and I'm allowed to have roosters here, so people need to get over themselves. If you live in the country, expect to hear animal noises. I keep telling myself I need to get a sign like this one.