Three big Ephemerella subvaria mayfly nymphs share a rock with some cased caddis larvae.  In this picture: Saddle-case Maker Genus Glossosoma (Little Brown Short-horned Sedges) and Mayfly Species Ephemerella subvaria (Hendrickson). From the Namekagon River in Wisconsin.
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Three big Ephemerella subvaria mayfly nymphs share a rock with some cased caddis larvae.
In this picture: Saddle-case Maker Genus Glossosoma (Little Brown Short-horned Sedges) and Mayfly Species Ephemerella subvaria (Hendrickson).

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