"In some important ways, New York City's cockroaches are eerily similar to its human inhabitants. New research shows the insects tend to stay in the neighborhoods they grew up in and segregate themselves, much like the city's ethnic groups and income classes. And as in many a New York immigrant tale, cockroaches' ancestors likely came to America as stowaways…. A cockroach found on the Upper East Side is genetically different than the Upper West Side and Roosevelt Island cockroaches, Dr. Stoeckle and his team have found."
—Also the tiny cockroach who was Cockroach Mayor for the last 12 years vastly increased inequality for cockroaches across New York City.