And to set the mood: “He led the way in under the huge branches of the trees. Old beyond guessing, they seemed. Great trailing beards of lichen hung from them, blowing and swaying in the breeze. Out of the shadows, the hobbits peeped, gazing back down the slope: little furtive figures that in the dim light looked like elf-children in the deeps of time peering out of the Wild Wood in wonder at their first Dawn.” ― J.R.R. Tolkien, The Two Towers
Now that I think about it, I really do NOT want to meet a Treant alone in the forest at night. Even if they seem friendly and harmless. You just never know.