That's the tallest tree I've ever seen in my life.
The tree made a loud sound when it fell.
This tree only grows (i.e., germinates, develops) near a river. It grows (i.e., gets big) very quickly.
The wood of this tree is an important fuel for the Na'vi.
If you shake the tree, the fruit will fall. (That is, actions have consequences.)
Jake rolled under the fallen tree to escape from the thanator's teeth.
The trunk of the tree feels solid, although it's dead.
This kind of bird builds its nest in a tree cavity so as to protect its young from predators. For this purpose, a hole going right through the tree trunk isn't suitable.
Contribution from the li'fyaolo' Night of Pandora. The forest is full of life. Many creatures and beasts walk, hunt, and fight to survive. Plants glow to give wonderful bioluminescence to the forest. Fan lizards turn, water flows under the blue bioluminescent light. A Na'vi boy walks aimlessly through the forest to feel peace and to see the night's beautiful life. He makes glowing foot tracks on the strong branches of a tall tree. A beautiful skin-blue color fills the sky, the large world stands strong with his siblings and the stars which seem so small. The boy approaches a lake and thinks about the beauty of the world. Eywa smiles upon this one, who is called Zuvo.
Sadly, there are only dead trees where the fire has been.
Hometree is a special kind of tree.
The trunk of that tree is very wide; the kid cannot climb it.
She used her tail to point out the tree Loak was hiding behind.
It's hard to keep holding a bow while climbing a tree.
Last night as I was walking through the forest, a frightening demon appeared in front of a big tree.
My dear mother died yesterday. We buried her under a beautiful tree beside the river.
Watch out! There's a hammerhead track under this tree!
That night beneath the trees when she looked at me meaningfully, I knew by the expression on her face that she loves me.
The tree on the other side of the stream in front of my house is very tall.
(That places too much emphasis on utral, which is only the standard of comparison and presumably hasn't yet figured into the conversation. In this case na utral would be preferable.)