Hyun Kounne generously provided photos of the striking, hard-to-find Heptagenia culacantha from the mainstem Delaware River. She mentioned it was one of maybe half a dozen she saw on the water that day.This mayfly was collected from the Delaware River on June 3rd, 2017 and added to Troutnut.com on December 5th, 2019.
Photo credit: Hyun Kounne
Photo credit: Hyun Kounne
Photo credit: Hyun Kounne
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