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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.

Male Ephemerella excrucians (Pale Morning Dun) Mayfly Dun Pictures

This mayfly was collected from the Henry's Fork of the Snake River in Idaho on July 31st, 2020 and added to Troutnut.com by Troutnut on August 17th, 2020.

Discussions of this Dun

Ventral view
1 replies
Posted by Martinlf on Sep 5, 2020
Last reply on Sep 6, 2020 by Troutnut
Love the ventral photo. One guide ties duns with green abdomens and a bit of orange in the thorax. I see why now. Super photos.
Public service announcement: PMDs aren't yellow
13 replies
Posted by Troutnut on Aug 17, 2020
Last reply on Aug 29, 2020 by Wiflyfisher
It seems like most of the imitations I see in fly shops for PMDs, and dubbing mixes or other body materials designed to imitate PMDs, are a pale yellow color. I would just like to use this specimen to point out that in many cases (or in all the cases I've seen), most true PMDs (Ephemerella excrucians) are not yellow, but olive (with a bit of a gold tinge). I have some René Harrop PMD dubbing with the appropriate olive cast, but other than that I'm just seeing a lot of pale yellow more suited to eastern sulphur mayflies than excrucians.

The label PMD also applies to Ephemerella dorothea infrequens, but it seems they're also green as duns, unless I misidentified that specimen by associating an excrucians dun with nearby dorothea spinners.

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