Trout may feed heavily on any stage of these large caddisflies.Hatching BehaviorThe pupae crawl out onto shore to emerge, but it may be useful to imitate their subsurface movements.Egg-Laying Behavior
» Genus Phryganea (Rush Sedges)
Time Of Day: EveningThe large adults have very unusual egg-laying behavior, described well by Gary LaFontaine in Caddisflies:
In the evening they begin the mating and egg-laying activities, the females flying thirty to forty feet up in the air and dive-bombing the surface. The large insects hit the water with such a force that they send up small splashes. During intense egg-laying activity they may make a smooth surface look rain splattered.
Swisher and Richards describe a different behavior for the genus in Selective Trout:
Females lay their eggs on the water's surface and run across the water to return to shore.
Readers familiar with this genus are encouraged to reconcile these conflicting accounts in the comments. It may be that both are correct, and the running behavior follows after the splash-down.Larva & Pupa BiologyCurrent Speed: Still or slow
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