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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.

For how many years, I wonder, have these huge slabs of rock sheltered wild brook trout? From Mystery Creek # 89 in New York

Stream photos

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Skwala (Large Springfly) Stonefly NymphSkwala (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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Updates from April 3, 2007

Updates from April 3, 2007

Closeup insects by Bnewell from the Big Thompson River in Montana

Male Rhithrogena virilis Mayfly Spinner
2 Pictures
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the Big Thompson River in Montana
Before I reared this specimen the nymphs were unknown. See Western North American Naturalist for the paper on the description of this species' nymph.
Added by Bnewell on June 26, 2011
Collected April 3, 2007 from the Big Thompson River in Montana and added by Bnewell on June 26, 2011

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