Heptageniidae (March Brown)
Heptageniidae and Leptophlebiidae often share the same areas as the torrents, the former in the fastest stretches of torrent, the latter in the slowest stretches. Both hatch at the beginning of the season, but the phenomenon repeats until almost autumn. Fly-fishers cannot underestimate the use of Extended Body and Spent during the hatch and dancing of the Spinners. The Drift Dun model is very effective.