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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.

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.
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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7
Apr 2, 2021
by Taxon
13
Mar 30, 2021
by Taxon
1
Jan 12, 2021
by Troutnut
Posted photos
Nov 10, 2020 by Rtsme91
0
3
Sep 23, 2020
by Leskorcala
1
Jul 23, 2020
by Taxon
2
Jul 16, 2020
by Partsman
5
Jun 15, 2020
by Troutnut
3
May 1, 2020
by Martinlf
4
Apr 16, 2020
by Taxon
5
Feb 20, 2020
by Leskorcala
6
Feb 19, 2020
by Wbranch
2
Feb 18, 2020
by Cherylkorca
Stonefly?
Oct 30, 2019 by Pdcox
10
Dec 8, 2019
by Taxon
1
Sep 14, 2019
by Troutnut
1
Aug 27, 2019
by Taxon
3
Jul 15, 2019
by Tuckcast
2
Jun 10, 2019
by Btbo32
4
Apr 3, 2019
by Konchu
Stonefly?
Feb 20, 2019 by Agresens
2
Feb 21, 2019
by Creno
larvae vs nymph
Aug 2, 2009 by Billq
7
Nov 5, 2018
by Wbranch
2
Sep 18, 2018
by Konchu
Heptagenia?
Aug 23, 2018 by Orvisman
1
Aug 26, 2018
by Martinlf
5
Apr 24, 2018
by Adirman
5
Apr 23, 2018
by Millcreek
1
Apr 12, 2018
by Redfisher85
2
Feb 17, 2018
by Ihunta
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