Last week on a nice day, my wife, me and a friend was sitting in our back yard. Suddenly a flock of birds, about 15, all black, with a wing span of would 3 foot, passed over my house. They turned and went about 3 houses down and started to circle like vultures... I said, "Look at that, they look like small eagles." One bird broke off of the circle and flew down to us, and circled over us. I'm guessing they were about maybe 75 to 100 yards above us. So we could see they were black and looked like birds but that was about it. Then the one that was circling us, few back to the others and they all few south about 1/4 mile, and started the circle pattern again. I said, "look at those birds, none of them are flapping their wings...!!!" We all watched them, and again, none of them flapped their wings. While they were near us, I ran inside and got my phone to try and take their pictures, but as soon as I stepped out, they flew off. It was very, very, weird...! Ok, back outside for more work, and watching for birds..!