Human

Humans are living things that live on planet Earth in real life. In fiction, they aren't limited to just that sad little blue ball—they can live on other planets like Mars, Venus, or a totally fictional planet. They're what most stories ever told have as most of their cast.

Abilities (And The Lack Of Them)
In reality, humans are known for their continuous progress forward into a Utopian Future with research in many spheres of society such as government, politics, and technology in general. But aside from always finding a new way to amaze themselves, humans don't have many other abilities. They can't fly without airplanes like birds, they can't swim all that powerfully like fish, they can't use magic or superpowers like mages or superheroes, and they can't do anything really cool without machines like, well, pretty much everyone else. They die to just about everything if it comes in large enough doses: fire, water, gravity, incoming objects, and even air.

Humans and other races
Humans often don't get along with other races such as animals and aliens. They're also seen as inferior to other intelligent races that were able to leave their home planet, run more advanced societies, and have more abilities than humans. When intelligent alien races encounter humans, this might result in an Alien Takeover that humans could somehow overcome despite being depicted as worse than the aliens in almost every way.