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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 Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Nymph from the East Fork Issaquah Creek in Washington
This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.
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 Baetis bicaudatus (BWO) Mayfly Nymph Pictures

Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
Lateral view of a Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
Dorsal view of a Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
Ventral view of a Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
This image is enhanced in false color to show the fine setae on the tail.

Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington
Ruler view of a Male Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Chatter Creek in Washington The smallest ruler marks are 1 mm.

This mayfly was collected from Chatter Creek in Washington on June 3rd, 2022 and added to Troutnut.com by Troutnut on June 4th, 2022.


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Male Baetis bicaudatus (BWO) Mayfly Nymph Pictures

Collection details
Location: Chatter Creek, Washington
Date: June 3rd, 2022
Added to site: June 4th, 2022
Author: Troutnut
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