The czech tan bug is one of our favorite fishing flies when we are out guiding, especially for the grayling. On this fishing fly note the fibres hanging down at bottom. In the water these move with the current and give life to the fly. Czech nymphs have heavy wire in their construction making them sink deeper than conventional nymphs. This allows them to get down to the bottom zone where the fish are often feeding. A classic trout fly and a supreme fish catcher.