Library · Flies
F-Fly — house-style illustrationIllustration

F-Fly

Dry
#16–20grey / olive / blackBest: Apr–Sep

When to use

Fratnik's minimal CDC sliver is the small-fly problem-solver: when fish are sipping and refusing everything with a hackle, an F-fly in 18–20 on a degreased 6X–7X tippet is the answer. Dead-drift upstream to the rise, singly. Carry grey, olive and black — the black doubles as a smut/gnat pattern. Dry the CDC with amadou, never gel floatant.

Imitates

Small stuff in the film — pale wateries, blue-winged olive duns, midge and smutting rises the bigger dries can't answer.

Team position

Single fly, upstream to a sighted riser.

Best methods

Dead-driftDry, static

Dressing

Hook
dry fly, #16-20
Thread
grey, olive or black to suit
Body
tying thread only, touch-dubbed at most
Hackle
none
Wing
one or two natural CDC feathers tied flat, tips over the bend

Marjan Fratnik's original is thread and CDC, nothing else — resist improving it.

Pairs with

Retrieve & line

  • Fished dry and static — floating line

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