Cassowary

A black flightless bird. It lost its ability to flight as it has always live in an area with plenty of food and no natural enemies. Since then, its habitat expanded as its numbers increased, and it began inhabiting harsher environments like miasma-filled areas as well. It is extremely fast, so much so that if one were to [sic] targeted by an enemy, they could easily run away. Its wings are mainly used to aid in balance while it runs.