In a past journal on another site, I've described tail emotes.

One of those videos going viral on various sites right now shows a squirrel in Montreal, Quebec, Canada investigating a camera attached to a piece of bread. Watch its tail as it investigates this weird thing attached to food (it'll eventually take the bread and camera and carry it up a tree).

The tail wigwagging as it cautiously approaches the bread/camera is (caution/nervoustailflick)ing. };3

Link: http://youtu.be/4_gmkhE7YQc