We almost stepped directly into this scene:

A closer look at the carnage, seen diagonally through a pane of 1955-era glass:

The Cooper’s Hawk remained frozen in place while I got a better view from outside:

It then flew away with the gibbage in its claws, leaving us a doormat covered with feathers.
We’re not sure if the meal was a mockingbird or a Downy Woodpecker, but we’re apparently short one bird…