Insanity wolf meme with a beaver face instaed with the text "Can't find a pond for protection. Fucking makes one."
I seem to recall reading about an experiment done in the wild.
A speaker playing the sound of running water was placed on dry ground where scientists knew beavers lived and left for a few weeks.
When they checked back on it, the beavers had built a dam structure on the speaker despite there being no water...