It is an insect from the Caenidae family. I met him for the first time. It occurs only along mountain streams and in very clean waters. I do not stay in the mountains, but on a glacial moraine which has a climate very similar to the mountain climate. The total length of the insect did not exceed 20mm and it was very mobile. But a few shots were pretty good.
I have been interested in photography all my life and remember quite well developing my first black and white films myself... My favorite subjects are...