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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.

Rhithrogena virilis Mayfly Spinner Pictures

Before I reared this specimen the nymphs were unknown. See Western North American Naturalist for the paper on the description of this species' nymph.

This mayfly was collected from the Big Thompson River in Montana on April 4th, 2007 and added to Troutnut.com by Bnewell on June 26th, 2011.

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