These strangely lighted and enhanced "wingprint" photos can help with the identification of some species even when the veins are clear.  Female Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Spinner from the West Fork of the Chippewa River in Wisconsin
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These strangely lighted and enhanced "wingprint" photos can help with the identification of some species even when the veins are clear.
Female Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Spinner from the West Fork of the Chippewa River in Wisconsin

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