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Updates from May 5, 2007

Closeup insects by Bnewell from the Upper Stillwater River in Montana

Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly NymphAcerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Nymph View 3 PicturesThis is a very rare mayfly in western Montana. The shape of the last gill is a key to its identification. I have collected this species in only one location.
Collected May 5, 2007 from the Upper Stillwater River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
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