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Ecdyonurus criddlei (Little Slate-Winged Dun) Mayfly Nymph Pictures

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

This mayfly was collected from Kintla Lake on July 31st, 2007 and added to Troutnut.com on June 26th, 2011.

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

Recent Discussions of this Nymph

Ecdyonurus nymphs
Posted by Jmw975 on Dec 11, 2012
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
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