Rats!

Even Gato might need some backup here:

Rats have long been a problem in New York City, with such a dense population and such a large and readily available food supply for the rodents. They are frequently seen scampering through subway tunnels, rooting through trash, dashing across parks and burrowing into the walls of apartment buildings.

Greenwich Village tends to be a happy home for them because of its combination of older buildings and a tangle of subway lines converging just below street level.