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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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

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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.

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Marilia cases and pupae

Millcreek has attached these 2 pictures to aid in identification. The message is below.

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Nov 23, 2015November 23rd, 2015, 5:45 am EST

Thought I'd put these up in case anybody wanted to look at them. They're from this year, around August. The cases were found on medium to large cobbles in fairly calm areas.

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

PaulRoberts

Colorado

Posts: 1776

PaulRoberts on Nov 23, 2015November 23rd, 2015, 7:41 am EST

Wow! Simply gorgeous.

Crepuscular

Boiling Springs, PA

Posts: 920

Crepuscular on Nov 23, 2015November 23rd, 2015, 7:48 am EST

Nice Mark.I've never seen that one here in PA only Psilotreta. Pretty sure we don't have the genus.

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Nov 24, 2015November 24th, 2015, 5:13 am EST

Paul,

Thanks. I saw these and couldn't resist the opportunity to record the different pupal stages.

Eric,

I'm sure you don't have the genus in PA. There are two species in the U.S. from what I understand. M. nobsca from Texas and M. flexuosa from California, Arizona, Texas and Arkansas.

Edit: A further look at range maps shows M. flexuosa in New Mexico, Oklahoma, Missouri, Indiana, Vermont and Ontario. And that's just as far as the U.S. and Canada are concerned, looks like it's common in Central and South America as well.

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