Ents are a RuneScape random event. When a player tries to chop a tree, the tree has a chance of becoming an ent, also known as a "dancing tree" to some players. Like most random events, its purpose is to stop macro users. Since the ent can appear for each player chopping the tree, the odds of it showing up increases when woodcutting with more players. However, once it appears, it will influence all players chopping that tree.
If the character continues chopping at the ent, the woodcutting axe will become broken and useless. Once broken, a player can go to Bob's Brilliant Axes in Lumbridge to get the broken axe fixed. Bob will fix bronze, iron, and steel axes free of charge, and other woodcutting axe types (mithril and above) for a small fee. The stronger the woodcutting axe, the higher the repair cost. Alternately, the axe can be repaired in a player-owned house, reducing the cost.
To warn players that that tree is an ent, in the "Choose option" box for that tree, the "chop down - " will be in yellow instead of the usual light blue colour. Additionally, ents will appear as yellow dots on the mini-map.
To avoid losing your axe head click away, so you move away from the tree.
In the Wilderness revival plan, Ents are a type of monster that reside in the Wilderness. When a player succeeds in killing one, they will turn into an Ent trunk, which can be chopped for a log at random with higher-tier logs being awarded at higher Woodcutting levels.