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Fly Hatch Talk

> Penns Creek Slate Draker's

Sporadic hatches are rarely as outstanding as those of Isonychia. On streams with good populations, they are reliably hatching in light numbers, here and there, for most of the evening through most of the mid- to late season.

The spinners, and occasionally the duns, produce more concentrated action, but the real value of the Isonychia hatch is its duration and the size of the flies; large trout become ever watchful for them, even when they aren't emerging.

All the species of Isonychia are similar in appearance and behavior. Read more...

Isonychia bicolor (Mahogany Dun) Mayfly Nymph (7 Pictures)

Female Isonychia bicolor (Mahogany Dun) Mayfly Dun (13 Pictures)

Male Isonychia bicolor (Mahogany Dun) Mayfly Spinner (15 Pictures)

There are 17 more specimens...