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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 Hydatophylax argus (Giant Cream Pattern-Wing Sedge)

This is an especially large species, with pupae and adults up to hook size 2.

Where & when

Time of year : June through fall

Preferred waters: Small streams

In 53 records from GBIF, adults of this species have mostly been collected during May (53%), April (21%), and June (21%).

In 13 records from GBIF, this species has been collected at elevations ranging from 627 to 2740 ft, with an average (median) of 2008 ft.

Species Range

Hatching behavior

Time of day : Morning

Gary LaFontaine reports in Caddisflies that his trout stomach samples held many Hydatophylax argus pupae during their emergence in the East.

Specimens of the Caddisfly Species Hydatophylax argus

1 Female Adult

Start a Discussion of Hydatophylax argus


Caddisfly Species Hydatophylax argus (Giant Cream Pattern-Wing Sedge)

Species Range
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