Mark’s Halo Isonychia

Halo Isonychia

Last summer while working with the Kreinik silk dubbing, I came up with a new pattern idea for the isonychia mayflies which are favored by our Delaware River trout. There are two species that are common on the rivers: a size 10 mayfly that begins hatching in early June in a normal year (whatever that is) and continues into mid-July; and a size 12 fly hatching in September. Between them, isonychia are around long enough that Delaware trout respond to them throughout the summer.

Iso’s tend toward an olive body color immediately after hatching, then begin to darken to the claret or maroon color more commonly associated with the bug. I decided to tie a comparadun using the olive brown silk dubbing applied lightly over wine colored 6/0 Unithread. The translucency of the silk is wonderful and, as the fly gets wetter, the claret color of the tying thread bleeds thru until most of the olive disappears leaving a translucent sheen or halo effect.

I decided to use Enrico Puglisi’s Trigger Point fibers in dark dun for the wing. This produces a very natural veined effect in the wing, great shine for visibility on the water, and terrific durability. The fly proved itself immediately on a solo float on the Delaware last summer, bringing some nice rainbows to the top with no iso hatch in progress.

My explorations into the solo fly tying video thus continue. Still a few things to work out, but the lighting is improved. I hope you like the pattern.

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