Header image
Enter a name
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.

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington
This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
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.


Start a Discussion of Nymph

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
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy