This is an immature/juvenile Red-Tailed Hawk. It was hunting jack rabbits on the south edge of town when he flew by us. He had just missed a jack. They ride thermals as they soar overhead looking for prey, sometimes soaring for miles before flapping their wings once. His call is an unmistakable descending scream that virtually everybody has heard. Red Tails usually eat rodents, but will take a rabbit or other small animal.