Tiny Flies (Dansmuggen), Chironomidae.

Tiny insects along the dike, for miles in clouds. Flying and dancing in the soft wind on a warm, sunny spring morning, early May 2009. In a distance of about 500 meters you can hear the blades of a giant wind generator at a farm. A skylark is singing while hanging in the air to get higher and higher in a show flight.

Biophony
skylark., chironomidae