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Female Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Spinner Pictures

 I've seen Ephemerella invaria with green egg sacs and Ephemerella subvaria with yellow one. This one seems too large for dorothea. So what is it? I'm not sure.

Many females of this species were gathered in tight clouds to lay their eggs over the riffles in a mid-sized Pocono stream right at dusk. It would have been a fishable spinner fall if I'd stuck around to wait for them.


This mayfly was collected from Mystery Creek #42 on May 28th, 2007 and added to Troutnut.com on June 4th, 2007.

"Hunter orange" ball of eggs.  The debris sticking to it comes from my container and handling; it's not part of the structure.  Female Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Spinner from Mystery Creek #42 in Pennsylvania
"Hunter orange" ball of eggs. The debris sticking to it comes from my container and handling; it's not part of the structure.

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