2. Ents
At some point during Middle-earth’s history, male Ents and female Entwives roamed the lands taking care of all varieties of plant life that were sustained by the world’s rains and the sun’s light. But after the Entwives broke away from the Ents to dwell in the Brown Lands (which were subsequently razed by Sauron), they essentially disappeared from the world, leaving the Ents to lumber about and eventually play a role in destroying the dark wizard.
