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.

Stream photos

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Hydropsyche (Spotted Sedge) Caddisfly Larva Hydropsyche (Spotted Sedge) Caddisfly Larva

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.

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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.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Flat Creek Jackson Wyoming

Trnnflt has attached this picture to aid in identification. The message is below.

Trnnflt

Jackson Wyoming

Posts: 1

Trnnflt on Jan 1, 2017January 1st, 2017, 10:58 pm EST

Saw this brown mayfly on my door the august morning i arrived in jackson hole at the Elk Refuge Hotel cross the road from flat creek in Jackson Hole.
I'm new to learning about these aquatic insects and wondered what this one is?

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Jan 2, 2017January 2nd, 2017, 3:29 am EST

Michael- It looks like a male subimago Callibaetis species.

"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jan 2, 2017January 2nd, 2017, 3:31 am EST

Hi Michael-

I believe your avatar image to be that of a male subimago (dun) of genus Callibaetis, which is also known by the common name of Speckledwinged Dun, among numerous others.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com