Huorns moved seldom and often lived for days as trees in one spot, but when they desired they could travel quickly and crawl with their root-feet. They retained speech, and were mastered and shepherded by the true Ents. Although wild, dangerous, and certainly not advisable to approach, they were not evil in quite the same sense as Old Man Willow, nor wise and helpful in the same sense as Treebeard, but they hated Orcs with a passion and sought to undo extremely foul deeds when they could.
- Foster, Robert. The Complete Guide to Middle-earth.