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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Skwala (Large Springfly) Stonefly Nymph Skwala (Large Springfly) Stonefly Nymph

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington

This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.

6 Recently Added Photos

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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What is this bug?

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

Diver
Northern Ontario

Posts: 2

Diver on Sep 11, 2016September 11th, 2016, 6:21 pm EDT

Hi there, I found this insect skittering on the surface of a lake. Is this a terrestrial insect that blew onto the water? I cannot find a similar picture. I thought it might be a caddis species. This was in northern ontario on a canadian shield lake.

Thank you, Richard

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Sep 11, 2016September 11th, 2016, 9:04 pm EDT

Hi Richard-

I believe it to be the aquatic moth, Lomographa semiclarata (Bluish Spring Moth).

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Sep 12, 2016September 12th, 2016, 7:53 am EDT

Roger,

I believe it to be the aquatic moth, Lomographa semiclarata (Bluish Spring Moth).

I think it's likely L. semiclarata as well, but it's not aquatic as far as I can determine. The larvae feed on alders, chokecerries, juneberries, hawthorns, poplars and Prunus sp. I can't determine where it pupates, but there are no references to underwater pupation.

Mark

"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 Sep 12, 2016September 12th, 2016, 8:53 am EDT

Mark-

Yes, I should have said non-aquatic. :-)

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Sep 12, 2016September 12th, 2016, 10:45 am EDT

Roger,

Just keeping you honest :).

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

Diver
Northern Ontario

Posts: 2

Diver on Sep 12, 2016September 12th, 2016, 12:15 pm EDT

Hello and thank you! I had a great deal of fun last night after posting using various keys trying to come up with the species. I did not come anywhere close to the right guess! Thanks again Taxon and Millcreek.