Creatures
Centaur
A horse-bodied, human-headed star-reader of the Forbidden Forest, proud and territorial. Firenze teaches Divination after Dumbledore hires him; Bane and Ronan resent it. They read omens in the sky rather than act in human affairs.

In the books
Harry Potter and the Philosopher's StoneChapter: 15
Hagrid and Harry encounter centaurs while searching the Forbidden Forest for an injured unicorn.