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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.

Male Attenella delantala (Little Blue-Winged Olive) Mayfly Nymph Pictures

Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Dorsal view of a Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Ventral view of a Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Lateral view of a Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington
Ruler view of a Male Attenella delantala (Ephemerellidae) (Little Blue-Winged Olive) Mayfly Nymph from Mystery Creek #249 in Washington The smallest ruler marks are 1 mm.

This mayfly was collected from Mystery Creek #249 in Washington on July 25th, 2019 and added to Troutnut.com by Troutnut on July 26th, 2019.


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Male Attenella delantala (Little Blue-Winged Olive) Mayfly Nymph Pictures

Collection details
Location: Mystery Creek #249, Washington
Date: July 25th, 2019
Added to site: July 26th, 2019
Author: Troutnut
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