|[List of appearances]|
A Treehorn was a tall spider-like creature in the world of Ninjago. They were seen only once and lived in cold, snowy mountains, among the trees.
Treehorns were tall and white with grey splotches, with four long spindly legs and hooves for feet. Their bodies were thin and had short tails protruding from the back. They had long necks and narrow wedge-shaped heads with two oval-shaped red eyes. At first glance, among the snow-coated trees, the creatures looked very much like their namesake.
Lead on by a mysterious falcon, the four ninja traveled through deserts, over mountains and finally into a snow-coated forest where a sign read "Beware of Treehorns". Kai reassured Zane by saying they were probably "wild squirrels". When the ninja heard them, Jay hoped they were "cute, tiny birds". Zane was still in his father's house, a secret place underneath the ground, when the ninja were surrounded.
Kai spotted a comatose robot that had attacked Zane and been subdued earlier and realized that it was most likely built for the purpose of defending against Treehorns. The ninja were quickly overwhelmed. At that moment Zane exited his father's hideout and saw what was happening. Angry at the creatures for attacking his friends, he quickly dispatched of many Treehorns. The other ninja recovered and began to gain ground, driving the creatures back. The Treehorns retreated and regrouped as their queen arrived, the largest and most dangerous of all. It was then that Zane unlocked his true potential, freezing the Treehorn queen solid and sending the others scattering.
- It can be noted that progressing through the scene featuring Treehorns, their color schemes change from white to light blue, like Zane and NRG Zane