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Closeup insects from the Big Thompson River

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Rhithrogena virilis Mayfly NymphRhithrogena virilis  Mayfly Nymph View 2 PicturesBefore I reared this specimen the nymphs were unknown. See Western North American Naturalist for the paper on the description of this species' nymph.
Collected April 4, 2007 from the Big Thompson River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Rhithrogena virilis Mayfly LarvaRhithrogena virilis  Mayfly Larva View 1 PicturesA photo showing the minor details on the nymph of this rarely collected mayfly
Collected November 30, 1999 from the Big Thompson River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
Cinygmula reticulata (Western Ginger Quill) Mayfly NymphCinygmula reticulata (Western Ginger Quill) Mayfly Nymph View 1 PicturesI collected several live specimens of nymphs and reared them to the imago (Imago: The sexually mature adult stage of the mayfly is called the imago by scientists and the spinner by anglers.) stage. They were C. reticulata. The interesting thing is they were collected in May and were emerging along with Rhithrogena (March Brown). This seems to be an overlooked hatch since in some rivers it emerges very early, before runoff.
Collected May 10, 2009 from the Big Thompson River in Montana
Added to Troutnut.com by Bnewell on June 26, 2011
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