Yellow Svarpian
As you keep walking on the path, the trunk of a big tree comes into view. It's branches reach to the sky, obscured by the rest of the plantlife. As you gaze up in wonder, you spot an unusual bright yellow between the leaves. And sure enough, the ribbon of yellow moves, slithering down through the branches and down the trunk until you come eye to eye with the yellow svarpian.

Quick! Charm it!

Inch your way around the big tree and continue on to where you hear splashing.
Inch you way around the tree and follow an animal track heading to the west.
Or, decide you've had enough and head back to the Hollow Tree.