Boars

Boars were aggressive tusked beasts common to woodland regions. The most famous of all the boars of Middle-earth was the great Boar of Everholt, that lived beneath the trees of the Firien Wood. This boar was hunted by King Folca of Rohan, and though he eventually killed his quarry, the King was mortally wounded in the encounter.

Portrayal in adaptations

2007: The Lord of the Rings Online:

Boars are found in many places of Middle-earth, especially in the Bree-land. They are typically not agressive, but will fight if the player threatens them.