The Ga'Hoolology Chaw
Upon setting foot in the hollow, you don't see anyone. How odd - you think to yourself as you hear the loud wing flaps of a burrowing owl getting closer and closer to you.
Hello, dear. Excuse my brief absence, I was supervising a flint mop. I hope you weren't alone here for too long.
You turn around to see a small burrowing owl with green eyes.
I'm Dewlap - the Ga'Hoolology ryb; if you have any questions about the tree, you can ask me.
You decide not to take Dewlap up on the offer, and instead direct your attention towards the maps hanging on the wall.
A map of the tree from the books
A map of the tree from the movie