Tying the CDC F-Fly – video and step-by-step instructions

Macro close up f Fly bobbin arty

The F-Fly is an Eastern European pattern that was apparently devised to imitate caddis. Tied with CDC it is a great fly for mayfly hatches and can be used effectively on highly selective trout. We tie it in sizes 14 through to 18 using the pattern included in Tasmanian trout guide Daniel Hackett’s Fly Cards publication.

I am great devotee of tying with CDC – something I picked up in Japan where some very smart fishermen and fly tyers convinced me of the merits of it for fooling tough trout while I was living there.

It’s one of my first choice flies at the beginning of an evening rise as it can imitate both mayfly and caddis and can pass for an emerger too.

It’s also a very simple fly to tie and can be cranked out in less than two minutes! For some details on the original creator of the F-Fly, Slovenia’s Marjan Fratnik, check out this article.

CDC F-Fly Materials List:

Step 1

Tiemco 100 hook in vice

Lay down a thread base

Step 2

Dub on some Hare’s Ear to create a thin dubbing rope. Use dubbing wax to make it easier to get a thin rope of even consistency.

Step 3

F -Fly step image fly tying dubbing rope

Dub a thin tapered body stopping just short of the hook eye.

Step 4

f fly step image

Take 3-5 CDC feathers and align the tips and tie in so that they form a wing that just overlaps the bend of the hook.

Step 5

Macro close up f Fly vise

Cut off the ends. Build up a neat thread head over the top of the tips and whip finish and there you have it – the CDC F Fly.

F Fly Video Instructions: Watch Me Tie This Pattern


  • Rick Wallace is a passionate angler and fly fisher whose work has appeared in fishing publications including FlyLife. He is a regular on fly fishing podcasts and appeared in the international fly fishing film Predator.

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