The tree contains alkaloids in its bark, leaves and roots.

Some trees contain birds that will run around the level after they have been chopped down, yielding 1,000 points if touched by the player.

This tree contains two wide branches, which means that it is a bilingual school.

While the tree does contain bark, it is not especially thick.

The tree and its parts contain strong toxins, some unidentified.

The tree where the bug was found, he said, contained a birdhouse.

The tree often contains large hollows in the trunk or branches.

The east trees just contain regular trails, with minimal stunts and jumps.

This second tree, we observe, contains some sort of mine.

These trees contain its primary sources of food (raccoons and honey).