Windsock

A windsock is a tapered conical textile tube made with relatively lightweight material. When hung from a pole, it can be used as a basic indicator of wind speed and direction, or as decoration. Windsocks are typically used at airports to show the direction and strength of the wind to pilots, and at chemical plants where there is risk of gaseous leakage.

They are also sometimes located alongside highways at windy locations.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 3.0

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