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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 Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington
This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.
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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Caddisfly Family Psychomyiidae

Two species of this small family may be very abundant and important to the angler, Psychomyia flavida and Lype diversa.

Where & when

In 254 records from GBIF, adults of this family have mostly been collected during June (28%), July (22%), May (19%), and August (14%).

In 154 records from GBIF, this family has been collected at elevations ranging from 20 to 8924 ft, with an average (median) of 2342 ft.

Family Range

Hatching behavior

The pupae emerge by swimming to the surface.

Egg-Laying behavior

Females dive to the bottom of the river to lay their eggs.

Larva & pupa biology

Diet: Algae, leaves, animal matter

Shelter type: Silk tube attached to underwater surfaces and covered with various types of stream debris


Start a Discussion of Psychomyiidae

References

Caddisfly Family Psychomyiidae

Taxonomy
Genus in Psychomyiidae: Lype, Psychomyia
2 genera (Paduniella and Tinodes) aren't included.
Family Range
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