I collected Mum's garbage as Tuesday night is my most exciting night of the week. >;-) I heard the blackbirds going nuts and thought it might be caused by the little black cat that has been leaving prizes in my small carrot plot so I walked between the apple tree and the fence to investigate. There is public sidewalk next to the fence and a row of poplars on the other side of the sidewalk. Just as I got to a gap in the poplars a hawk with a two foot wingspan barreled thru the gap doing a dip type u-turn and rocketed upward about three feet from me, followed by about 8 blackbirds... up and over the poplars and out of sight.
I expect it was the same hawk responsible for all the pigeon feathers on my back lawn lately.
I have no idea what kind of hawk it was as it was at high speed and it startled me. Actually, the only reason I KNEW it was a hawk was because of the speed and the action and shape of the wings.