AB Fish Report
Insect Encyclopedia

Spotted Sedge

Hydropsyche spp.

Hydropsychidae

CaddisflyHook #14-188-14 mm body

Peak activity

JanFebMarAprMayJunJulAugSepOctNovDec

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Larva

Soft-bodied larva often in a case or net; clings to rocks or vegetation.

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Adult

Moth-like wings held tent-like over the body; long antennae.

Habitat & hatch

Found in rivers, tailwaters, and lake littoral zones, most commonly in riffles, runs, and bank. Larvae on bottom or in vegetation; adults on surface. Evening emergence common; adults skitter across the surface; egg-laying females dip to water.

Timing

Individual emergence windows typically last 14 to 30 days. Strongest surface activity occurs around the evening, and dusk.

Sources

  • AB Fish Report synthesis from peer-reviewed Alberta and western North America literature.