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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.

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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Male Acentrella turbida (Tiny Blue-Winged Olive) Mayfly Spinner Pictures

I would not like to have to match this hatch. These are the smallest mayflies I have ever seen. I used to think Caenis was the smallest adult mayfly in the west but these guys are about 4mm long. The male eyes are two toned, brown above and olive below. The abdomen is dark brown interspersed with light brown. The abdomen is clear for the anterior 2/3rd and the remainder is white. The tails are twice as long as the insect. There is only one pair of wings.

This mayfly was collected from the Touchet River in Washington on July 27th, 2011 and added to Troutnut.com by Bnewell on July 27th, 2011.


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Male Acentrella turbida (Tiny Blue-Winged Olive) Mayfly Spinner Pictures

Collection details
Location: Touchet River, Washington
Date: July 27th, 2011
Added to site: July 27th, 2011
Author: Bnewell
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