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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.

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Caddisfly Species Brachycentrus occidentalis (Mother's Day Caddis)

Gary LaFontaine tells the story in Caddisflies of how this species came to awareness through rumors of a widespread, intense hatch of an undentified brown and green caddisfly throughout the West. He traveled across the West collecting these flies and determined that they were Brachycentrus occidentalis.

Where & when

Time of year : Late April and early May

In 36 records from GBIF, adults of this species have mostly been collected during May (33%), April (31%), March (22%), and August (6%).

In 15 records from GBIF, this species has been collected at elevations ranging from 66 to 19029 ft, with an average (median) of 5367 ft.

Species Range

Hatching behavior

Time of day : Daytime

Start a Discussion of Brachycentrus occidentalis


Caddisfly Species Brachycentrus occidentalis (Mother's Day Caddis)

Species Range
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