A wind vane, also known as a weather vane, is a tool used for determining the direction that the wind is blowing. These instruments have been in use for centuries, including an interesting history dating to ancient Rome. They come in many designs, from sleek and professional to ornamentally fun, but they usually follow similar aerodynamic design rules. Wind vanes are so popular that there even is a dispute about the largest one in the world. Weathervane can be used in garden, lawn or house top
It helps to know the direction of the wind and makes garden or house top more attractive.