The bariaur first appeared in second edition in the Monstrous Compendium Outer Planes Appendix (1991). The bariaur appeared in the Planescape Campaign Setting (1994) as a player character race as well as in the Planewalker's Handbook (1996).
The bariaur appeared in the third edition in the Manual of the Planes (2001), and the Book of Exalted Deeds (2003). The bariaur was presented as a player character race in Dragon #312 (October 2003), and the Planar Handbook (2004).
Bariaurs resemble goat-centaurs. From the waist up, a bariaur looks human, except for a pair of curling horns emerging from the top of their forehead. From the waist down, however, they have the body of a large goat. Although they are similar to centaurs, bariaurs traditionally do not take kindly to this comparison, and consider themselves beings in their own right.
Bariaurs travel through Ysgard's rolling hills and woods, protecting all who call that plane home. When evil is afoot, they track it to its source, then charge into glorious battle.