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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 Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this 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 Species Chyranda centralis (Pale Western Stream Sedges)

Where & when

Time of year : Mid-July to October

Preferred waters: Small streams

This is a common species across the West.

In 45 records from GBIF, adults of this species have mostly been collected during August (51%), July (33%), June (7%), and September (7%).

In 51 records from GBIF, this species has been collected at elevations ranging from 156 to 11201 ft, with an average (median) of 6726 ft.

Species Range

Hatching behavior

Time of day : Evening

Egg-Laying behavior

Time of day: Evening

Start a Discussion of Chyranda centralis


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

Caddisfly Species Chyranda centralis (Pale Western Stream Sedges)

Species Range
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