The river Kamenice has a special meaning to me, as I have fond memories (as shown in attached video :-) of it from my whitewater kayaking days.
This time of the year the waters were low and clear, with the rocky bottom clearly visible, and overall looking much tamer. But it was the same river none the less.
The white butterbur flowers were in bloom on the margins, and some grayish mayflies and small Bibios were on wing. Local Brownies were picking them off the surface and could be tempted on a dry fly. The fish were on the smallish side, but obviously locally bred and beautifully colored. Plus they attacked the fly with zest and fought with an attitude.
The color of the fish matched the color of the stream bed perfectly and upon releasing seemed to disappear immediately, despite the seemingly bright yellows and reds.
Later in the day I moved to slower parts of the river, where the brownies were joined by Grayling.
At around 5 o'clock the hatch intensified, and I suddenly found myself standing knee deep in a river, surrounded on all sides by rising fish, oblivious of my presence. Quite an experience! The heavier hatch brought up also the bigger fish, some of them over the 30 cm / 12 inch lenght, making them "decent fish" for the water.
All of my catches were on my Owl and CDC mayfly. It is my first choice for imitating medium gray mayflies, and since it performed so well I found no reason to experiment.
The tie:
#16 Hanák 130BL hook (or any other lightweight dry fly hook, e.g. Tiemco 103BL)
8/0 UNI thread Tan
tail of barred Coq de León fibres
body of a herl from an Eagle Owl feather, reinforced by counter wrapping with the finest copper wire I could find
wing of CDC feathers, spun in loop and wound as hackle, trimmed to size and shape