Wind vanes point toward the origin of the wind instead of in the direction of the flow.
Decorative wind vanes use various shapes, like roosters and flags, for the tail. An anemometer spins faster as the wind speed increases. The cup anemometer depicted here has a generator in the base that puts out an electric current proportional to the wind speed. Another type of cup anemometer sends an electric pulse for every revolution, so the frequency of the pulses is proportional to wind speed.