Jim Garlock photographed a beautiful Red-shouldered Hawk, Buteo lineatus, sitting on a tree branch on The Sea Ranch recently. This Hawk lives in forests near water in California and the East. They eat small mammals, birds, reptiles, amphibians and crayfish. Perhaps Jim's hawk is looking for a nice fat mouse.
Here's a link to the Cornell Lab of Ornithology to hear what this hawk sounds like: http://www.allaboutbirds.org/guide/red-shouldered_hawk/sounds/ac
Thanks to Jim for allowing me to share his photo with you here.