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.
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This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
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Large Mahogany Duns
This common name refers to only one species. Click its scientific name to learn more.
Mayfly Species Isonychia bicolor
These are sometimes called Large Mahogany Duns.
This is by far the most important species of Isonychia. Many angling books once split its credit with the species Isonychia sadleri and Isonychia harperi, but entomologists have since discovered that those are just variations of this abundant species.
See the main Isonychia page for more about these intriguing mayflies.
See the main Isonychia page for more about these intriguing mayflies.
I collected this female together with a male.
See 16 more specimens...