Glad to hear your ducks are assertive and went on the offensive. Always makes me happy to see or hear of the prey defending themselves from the predator.
This morning I was hearing a single chirp repeated from across the ditch. My domestic birds all stay on this side of the ditch. None of my birds were in sight nor could be heard, not even the geese. I walked out in the direction of the chirping. I spooked a hawk from the apricot tree beside the ditch. It was a gambles quail making the alarm sound several yards farther across the ditch in my fallow garden from the safety of a brush pile. Once the hawk flew away the chirping stopped and in a few minutes all the normal bird sounds of the neighborhood were heard again.