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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 Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
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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Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph Pictures

Ventral view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from Eighteenmile Creek in Wisconsin
Dorsal view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from Eighteenmile Creek in Wisconsin

This mayfly was collected from Eighteenmile Creek in Wisconsin on June 5th, 2005 and added to Troutnut.com by Troutnut on May 24th, 2006.


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Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph Pictures

Collection details
Location: Eighteenmile Creek, Wisconsin
Date: June 5th, 2005
Added to site: May 24th, 2006
Author: Troutnut
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