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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.

Isonychia bicolor (Mahogany Dun) Mayfly Nymph Pictures

This Isonychia bicolor nymph from the Catskills displays the prominent white stripe sometimes characteristic of its species. This is the first such specimen I've photographed, because members of the same species in the Upper Midwest have a more subdued stripe (and were once thought to be a different species, Isonychia sadleri). The striking coloration on this eastern nymph is more appealing.

This mayfly was collected from the Beaverkill River in New York on April 19th, 2006 and added to Troutnut.com by Troutnut on April 21st, 2006.

Discussions of this Nymph

Sare
Posted by Sare on Jan 28, 2020
Last reply on Jan 28, 2020 by Sare
I just love your webpage and all the info you guys provide and the pics are incredible.
Please keep up the great work you are doing - no other webpage comes close to you guys.
Thanks Sare

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