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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.

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington
This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.
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 Species Ameletus suffusus (Brown Duns)

Where & when

In 10 records from GBIF, adults of this species have been collected during June (50%), April (20%), July (10%), March (10%), and May (10%).

In 1 record from GBIF, this species has been collected at elevation of 3500 ft.

Species Range

Specimens of the Mayfly Species Ameletus suffusus

1 Nymph

Start a Discussion of Ameletus suffusus

Mayfly Species Ameletus suffusus (Brown Duns)

Taxonomy
Species Range
Common Name
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