Dry flies are supposed to imitate insects at the adult part of their life cycle. Dry flies are made to imitate flying insects like Stone flies, May flies, caddis flies, etc. You can see fish gulping down dry flies when you see the fish’s head break through the surface of the water. A few flies that can imitate these is the Parachute Adams, Griffith’s Gnat, Stimulator, Elk/Deer Hair Caddis, and the Royal Wulff.
Crimson Flies 