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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.

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.
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Ephemera simulans (Brown Drake) Mayfly Nymph Pictures

Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin
Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin
Dorsal view of a Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin
Ventral view of a Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin
Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin
Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin
Ephemera simulans (Ephemeridae) (Brown Drake) Mayfly Nymph from the Marengo River in Wisconsin

This mayfly was collected from the Marengo River in Wisconsin on June 5th, 2005 and added to Troutnut.com by Troutnut on May 25th, 2006.


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Ephemera simulans (Brown Drake) Mayfly Nymph Pictures

Collection details
Location: Marengo River, Wisconsin
Date: June 5th, 2005
Added to site: May 25th, 2006
Author: Troutnut
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