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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.

Lateral view of a Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington
This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.
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.

DayTripper
DayTripper's profile picture
Northern MI

Posts: 70
DayTripper on May 12, 2008May 12th, 2008, 8:26 am EDT
Here are some bugs I found waiting for the Hendricksons to pop this weekend on the Battenkill. I believe this first one to be Maccaffertium vicarium



Here's some others I haven't identified yet







I've got different angles on the Hendrickson Spinner, and the Brown Stone, as well as the Beetle- if they're needed. Also some more pics of different vicarium nymphs, some have a slightly different coloration.
GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on May 12, 2008May 12th, 2008, 9:23 am EDT
Just on a quick glance:

The vicarium ID on the heptageniid nymph seems reasonable; the stonefly nymph looks like a perlodid; the (male) Hendrickson spinner ID seems right (though missing a tail); the big beetle looks like some sort of "borer," but I have no clue about the hitchhiker; the caddisfly larva is a hydropsychid; and I'd guess that the stonefly adult could be in Taeniopterygidae. (Dave could probably sort that out for you.)
DayTripper
DayTripper's profile picture
Northern MI

Posts: 70
DayTripper on May 12, 2008May 12th, 2008, 2:52 pm EDT
Raider83
Indiana

Posts: 4
Raider83 on Jun 27, 2008June 27th, 2008, 6:24 am EDT
Daytripper, I think the mystery larva is a predaceous diving beetle larva
GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Jun 27, 2008June 27th, 2008, 10:48 am EDT
Raider83,

Some Dytiscidae larvae have a superficial resemblance to some caddisfly larvae. If this larva had been photographed in the water (and from different angles), I think the differences would be easier to see.

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