Red-tailed hawks are doing quite well in Manhattan: they have nests in Inwood Hill Park at the northern tip of the island (where I worked last summer) and in Bowling Green Park near the Battery, as well as in many places in between. They feast on the city's bounty of fat pigeons and nest either on the ledges of high-rise buildings or in dense tree canopies in city parks.
I had the good luck to witness a red-tailed hawk hunting high above Broadway last summer. I was walking down the street towards the subway station when I heard a red-tail's scream above me. I looked up just in time to see an explosion of feathers burst from the middle of a panicked mob of pigeons, and the burdened hawk coasting out from the middle of it and into the trees in Isham Park.
I've lived in the New Hampshire wilderness, hiked at the edges of the Tibetan plateau, skied down volcanoes, etcetera, etcetera, but watching a red-tail eviscerate a pigeon a hundred feet above Broadway in New York City ranks among the most amazing spectacles of nature I've ever witnessed.