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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Dorsal view of a Limnephilidae (Giant Sedges) Caddisfly Larva from the Yakima River in Washington
This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Caddisfly Genus Polycentropus (Brown Checkered Summer Sedges)

See Polycentropus cinereus for details. Of the nearly four dozen species in this genus, only it has been mentioned as significant to fly anglers.

Where & when

In 430 records from GBIF, adults of this genus have mostly been collected during June (37%), July (26%), May (14%), and August (13%).

In 113 records from GBIF, this genus has been collected at elevations ranging from 33 to 10663 ft, with an average (median) of 1781 ft.

Genus Range

Specimens of the Caddisfly Genus Polycentropus

1 Larva

Start a Discussion of Polycentropus

References

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

Caddisfly Genus Polycentropus (Brown Checkered Summer Sedges)

Taxonomy
Species in Polycentropus
Polycentropus cinereus
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Species in Polycentropus: Polycentropus cinereus
28 species (Polycentropus alabamensis, Polycentropus arizonensis, Polycentropus barri, Polycentropus blicklei, Polycentropus carlsoni, Polycentropus carolinensis, Polycentropus centralis, Polycentropus chelatus, Polycentropus chellus, Polycentropus chenoides, Polycentropus colei, Polycentropus confusus, Polycentropus denningi, Polycentropus elarus, Polycentropus floridensis, Polycentropus gertschi, Polycentropus halidus, Polycentropus maculatus, Polycentropus magnica, Polycentropus neiswanderi, Polycentropus pentus, Polycentropus pixi, Polycentropus rickeri, Polycentropus sabulosus, Polycentropus thaxtoni, Polycentropus variegatus, Polycentropus vernus, and Polycentropus vigilatrix) aren't included.
Genus Range
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