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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

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.
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 Species Wormaldia anilla (Little Autumn Sedges)

Where & when

Time of year : April to June and September to November

Preferred waters: Small streams

This species is common in the Northwest.

In 31 records from GBIF, adults of this species have mostly been collected during July (19%), September (19%), May (19%), August (13%), June (13%), and March (6%).

In 2 records from GBIF, this species has been collected at elevations of 69 and 1041 ft.

Species Range

Start a Discussion of Wormaldia anilla

References

Caddisfly Species Wormaldia anilla (Little Autumn Sedges)

Taxonomy
Species Range
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