Drew McCalley found this young Cooper's Hawk perched on top of his bird feeder recently. The hawk wasn't looking for birdseed, that's for sure. Cooper's Hawks eat smaller birds.

If you see a hawk staking out your bird feeder, you could take the feeder down for a day or so, encouraging the hawk to move on.

Cooper's Hawks are very agile fliers and very fast! They are year round residents of the Mendonoma Coast.
To hear their calls, here is a link to the Cornell Lab of Ornithology: http://www.allaboutbirds.org/guide/coopers_hawk/sounds.

Thanks to Drew for allowing me to share his photos with you here.