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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Skwala (Large Springfly) Stonefly Nymph Skwala (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.

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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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Mayfly from Spain: Ecdyonurus?

Isidro
Posts: 24

Isidro on Mar 4, 2008March 4th, 2008, 7:26 pm EST

Hello!
This mayfly was found into my city, Zaragoza, in NE Spain, in a river forest (poplars, oxes, etc) The river (Ebro river) is great, deep, slow and contaminated. The picture (sorry by the poor quality) is taked at April. Two cerci, about 2 cm wingspan, veis marked in dark, at least in coastal area.