Peregrine Falcon. Reaching speeds of over 200 mph in a dive, they are the Earth's fastest animal. This raptor was nearly driven to extinction, but now nests on nearly every bridge (and some building ledges) around New York City. Some biologist now believe that New York hosts the largest urban population of peregrines in the world.
55 Water Street has an annual live webcam for their nesting pair here. Since that nest is no longer active, you might want to try the falcon cam at Buffalo, NY here.