Last weekend I had some major Cooper's Hawk luck - I found TWO active nests about 3 miles apart. One had a bird on eggs, the other was still under construction. I was able to photograph, videotape, and capture audio of the pair that was nest building. I put some highlights into this short video. It was fascinating to watch the Coop gather nesting materials. A number of times he actually landed on a nearby driveway, walking around and searching.
The audio I got at the start of this video was a great score - I have heard Cooper's Hawks many times before, but having the pair vocalizing simultaneously was new. I used an Olympus LS-10, a very small hand held digital recorder, to capture their calls.