Ephemera varia "Yellow Drake" has 3 tails and the spinner will have some dark markings on the wings.
This mayfly spinner appears to only have two tails and clear wings. I think the genus is Hexagenia but I'm not sure about the species. It could be limbata or it could be another like rigida. Identification to the species level is beyond my ability most times. This fly is a perfect example of why the scientific types avoid common names. The 2 flies look almost exactly alike in the dun stage and I can see how they could both be called yellow drakes.
I do know this though, I'll take Hugh's imitation and catch some fish
Last edited by flyman; 06-20-2009 at 10:47 AM.
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