Thursday, December 5, 2013
By Ken Allen
(Continued from page 1)
These bugs often match the size of imitations tied on 10 or 12, 2x long hooks, depending on the water. A Zug Bug, a common, popular nymph pattern, imitates the natural Isonychia larvae well. Naturally, nymph imitations constructed just for imitating this mayfly also work.
Fly rodders in the know cast quartering across and downstream, let the fly swing in a tight arc like a horizontal pendulum, and then inch the fly back against the current like a swimming nymph.
It helps to stand in a river current and try to spot an Isony nymph swimming below the surface, which shows the caster the precise movement to duplicate.
In the right light, this isn't an impossible task, but sometimes it is difficult to see nymphs below the surface. Yes, no one ever said that fly fishing doesn't require exceptional observation skills.
When trout forage on Isonychia nymphs, folks with a Zug Bug or Isony imitation cast down and quartering across, and retrieve the fly upstream an inch or two at a time. This can produce dynamite evenings.
Micro blue-winged olives hatch all summer and offer good sport, but in June and early July, Light Cahill and Isonychia dry flies and nymphs, as well as Hex nymphs and dries can keep the good times rolling.
I've written about Hexes, probably one too many times here, but for day-in and day-out excitement, Light Cahills and Isony nymphs in June and early July really create great fun with rather consistent, predictable hatches.
Ken Allen, of Belgrade Lakes, a writer, editor and photographer, may be reached at: