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.

The North Fork Couer d'Alene River in Idaho

Stream photos

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Female Hydropsyche (Spotted Sedge) Caddisfly Adult Female Hydropsyche (Spotted Sedge) Caddisfly Adult

Lateral view of a Female Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Adult from the Columbia River in Washington

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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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Ecdyonurus nymphs

Ecdyonurus criddlei (Little Slate-Winged Dun) Mayfly Nymph

1 Picture

Ecdyonurus criddlei (Heptageniidae) (Little Slate-Winged Dun) Mayfly Nymph from Kintla Lake in Montana

This is an interesting Heptageniid mayfly since in western Montana it is only found in cold lakes, especially those in Glacier National Park.

Collected July 30, 2007 from Kintla Lake in Montana

Added by Bnewell on June 26, 2011

Collected July 30, 2007 from Kintla Lake in Montana and added by Bnewell on June 26, 2011

Jmw975
Guelph, Ontario

Posts: 20

Jmw975 on Dec 11, 2012December 11th, 2012, 3:47 am EST

Hi all,
These specimens are in great shape!

the lower nymph in this photo is definitely not E. criddlei, but E. simplicoides. E. simplicioides has that distinctive color pattern with the pair of rectangular pale markings on tergum 4 and no median markings on the other terga.

The upper specimen is probably E. criddlei, but seems to have more extensive pale markings than specimens from further west.

cheers,
Jeff