information about wind vane :)

Weather vane and bell on the roof of the Cathedral Saint-Étienne of Bourges (France)

weather vane with dial

Admiralty boardroom, 1808; a wind indicator can be seen on the end wall.

Tío Pepe wing vane in Jerez Guinness world record of the largest wind vane that works.

A "jin pole" being used to install a weather vane atop the 200 foot steeple of a church in Kingston, New York

A Weather Vane or Weather Cock is an instrument for showing the direction of the wind. They are typically used as an architectural ornament to the highest point of a building.

Although partly functional, weather vanes are generally decorative, often featuring the traditional cockerel design with letters indicating the points of the compass . Other common motifs include ships, arrows and horses. Not all weather vanes have pointers.
The word 'vane' comes from the Anglo-Saxon word 'fane' meaning 'flag'.