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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 Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
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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Eurylophella (Chocolate Dun) Mayfly Nymph Pictures

Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Cascadilla Creek in New York
Dorsal view of a Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Cascadilla Creek in New York
Ventral view of a Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Cascadilla Creek in New York

This mayfly was collected from Cascadilla Creek in New York on March 13th, 2005 and added to Troutnut.com by Troutnut on April 5th, 2006.


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Eurylophella (Chocolate Dun) Mayfly Nymph Pictures

Collection details
Location: Cascadilla Creek, New York
Date: March 13th, 2005
Added to site: April 5th, 2006
Author: Troutnut
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