Poland. a small town ¯ywiec in a mountain valley in the south of the country. surroundings of mountain grojec. forest nature reserve. on: 27/05/2018 between 17:00 and 18:00 pm, being on a walk in this area, i noticed a dark object hanging over the forest in the distance. at first i thought it was a rare big bird but i was curious that it hung motionless. i had a small compact photo camera with me, so i hurriedly took some pictures. after a while, the object moved very slowly to the right, disappearing behind the crown of trees. during the observation there was a gusty wind and thunder before the storm.