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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph Pictures

This specimen strikingly resembles another specimen from about 1300 miles away in the Catskills, which I tentatively called Ephemerella aurivillii. This one has much more prominent abdominal tubercles. It may be that they're both the same species and I don't have my identifications straight.

Lateral view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Dorsal view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin

This mayfly was collected from the Long Lake Branch of the White River in Wisconsin on June 5th, 2005 and added to Troutnut.com by Troutnut on May 24th, 2006.


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Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph Pictures

Collection details
Location: Long Lake Branch of the White River, Wisconsin
Date: June 5th, 2005
Added to site: May 24th, 2006
Author: Troutnut
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