If you are seeing any dark or black insects on the water, there is a very good chance you will catch fish with this black gnat pattern. It perfectly represents midges, standard house flies, horse flies, black caddis, and a variety of other insects. It could even pass for dark colored flying ants with ease.
The black gnat is a fly that deserves to be in your fly box at all times. This fly has always been one pattern that rarely let me down when there aren’t a lot of any particular flies fish are feeding on.