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The Specimen

Epeorus frisoni Mayfly DunEpeorus frisoni  Mayfly Dun View 9 PicturesI collected this male dun together with a female spinner, a female dun, and another male dun.
Collected September 6, 2006 from Mystery Creek #23 in New York
Added to by on October 3, 2006

The Discussion

GooseOctober 4th, 2006, 5:10 am
Posts: 77Nice photos, Jason. Are these the fall Sulphur Mayflies that have been discussed here and on a Pennsylvania web site?
TroutnutOctober 4th, 2006, 8:51 am
Bellevue, WA

Posts: 2522
I don't think so. This is one of several yellowish species I collected in September, and some of the others were much more widespread. I only found this species on one remote small stream in the Catskills. Surely it's found elsewhere but I don't think it's a major hatch.

Once I've got the rest of the pics online I'll try posting one each on the PA website and see if people can pick their "September peach fly" out of a lineup. Then I'll just have to figure out the species ID, which is no easy task since I've got mostly females.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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