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.

The "Fountain Flats" stretch of the Firehole was fishable in the morning after an uncharacteristically cold August night.

From the Firehole River in Wyoming

Stream photos

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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington

This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.

11 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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Baetisca obesa (Armored Mayfly) Mayfly Nymph Pictures

Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Lateral view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Artistic view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Dorsal view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Ventral view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Ruler view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York The smallest ruler marks are 1 mm.

This mayfly was collected from the Neversink River (above reservoir) in New York on May 6th, 2007 and added to Troutnut.com by Troutnut on May 10th, 2007.

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