The Invicta trout fly is great all year but best in late summer to autumn. Designed long ago by James Ogden it is still very widely used today. The Invicta trout Fly is a complex pattern that has lived on because of its effectiveness It is a real favourite for lake fishing and has a good reputation among trout fishermen. The pattern suggests insects and really resembles caddis and also small fry.This popular wet fly is also an excellent sea trout fly in the larger sizes. Its a great pattern to use during a sedge fly rise, probably imitating a hatching caddis or returning egg-laying female caddis that descends beneath the water.