Red-tailed Hawk in San Francisco HD

This is our fine-feathered visitor who appears outside our kitchen window every now and then. He (she?) likes to perch on our fire escape and occasionally swoop down and grab a pigeon. The faint chirping sound towards the end is a hummingbird who was hovering around the hawk. The crows like to make sport of taunting him but he seems unfazed by both by their antics and my camera.