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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
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.

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Ephemerella aurivillii Mayfly Nymph Pictures

This nymph hatched out in my aquarium into this dun.

Ruler view of a Ephemerella aurivillii (Ephemerellidae) Mayfly Nymph from Nome Creek in Alaska The smallest ruler marks are 1 mm.
Ephemerella aurivillii (Ephemerellidae) Mayfly Nymph from Nome Creek in Alaska
Dorsal view of a Ephemerella aurivillii (Ephemerellidae) Mayfly Nymph from Nome Creek in Alaska
Ephemerella aurivillii (Ephemerellidae) Mayfly Nymph from Nome Creek in Alaska
Ventral view of a Ephemerella aurivillii (Ephemerellidae) Mayfly Nymph from Nome Creek in Alaska

This mayfly was collected from Nome Creek in Alaska on July 10th, 2011 and added to Troutnut.com by Troutnut on July 13th, 2011.


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Ephemerella aurivillii Mayfly Nymph Pictures

Collection details
Location: Nome Creek, Alaska
Date: July 10th, 2011
Added to site: July 13th, 2011
Author: Troutnut
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