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Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

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Caddisfly Species Onocosmoecus unicolor (Great Late-Summer Sedge)

Where & when

Time of year : Mid-August to late October

Preferred waters: Rivers and lakes

This species is common in the Northwest and present but uncommon in the East.

In 83 records from GBIF, adults of this species have mostly been collected during July (34%), June (25%), August (23%), and September (11%).

In 55 records from GBIF, this species has been collected at elevations ranging from 16 to 10840 ft, with an average (median) of 5092 ft.

Species Range

Specimens of the Caddisfly Species Onocosmoecus unicolor

2 Adults
1 Male Adult
1 Larva

Start a Discussion of Onocosmoecus unicolor


  • LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.

Caddisfly Species Onocosmoecus unicolor (Great Late-Summer Sedge)

Species Range
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