Human / Mortal
These are the majority of the populace of Earth.
They come with all their usual weaknesses, and are relatively short-lived compared to the other citizens of the city. They also tend to be a rather fluid section of any city's population as they are often nomadic ,ever moving into the city, out of the city, or to a different part of the city.
They hold the widest diversity of all the species, and are greatly responsible for many of the difficulties of the other occupants living in the same areas.