While relaxing in the backyard looking for birds to photograph, there was a sudden movement of "something" swooping down across the yard, towards the back edge that borders a conservation area - all I saw was a light-colored blur out of the corner of my eye, bigger than a cat, smaller than a golden retriever, but definitely airborne, unlike most cats and dogs. All the birds that were nearby bolted in a flurry of flapping wings, away from the thing that swooped in. I was far too slow to use the camera and see the initial attack, but then a hawk comes suddenly off the ground at the edge of the woods with something in its talons. Might have been a small mammal (vole, mouse, baby squirrel).
I walked around to the other side of the yard where there a tree that hawks like to hang out in while scanning the grass for the next meal:
Anyway, the meal was not to be seen - must have escaped, the hawk couldn't have finished it in the time it took me to get across the yard, even if I was moving carefully to not alarm it.
And here is one of the birds that had visited earlier (but was long gone by the time the hawk attacked):
Both shots with T3i, 100-400, ISO3200, f/10 for the coopers hawk, f/8 for the brown thrasher.
You should take a second look at that "Coopers Hawk" though