Hook: Daiichi 1770 #12 Thread: Uni 6/0 Brown or Tan Tails: Pheasant Tail fibres Abdomen: Goose Biot Gills: Single Peacock Herl Thorax: Hares Mask fibres Wing: Two CDC Feathers Folded over.
Each winter I tie up a few experimental patterns, some fail miserably, others surprisingly effective. This is one, called The Isla Wren, I tied it up two years ago, and I now count it as one of my most successful flies. It is obviously to simulate ascending emerging mayflies. The weight of the hook wants to submerges the fly, but, depending on the water condition, the CDC and the other tying materials have a natural buoyancy and also trap sufficient air to prevent it sinking completely. I’ve caught many good trout on this last season, rarely did it fail me. I’ve tied up a couple of dozen for this season, half of which have slight variations, some have dubbed hares mask for the thorax, some have partridge fibres tied under the CDC wing to to simulate legs. Experiment mixing materials and colours to suit your own locality; I haven’t changed the abdomen because the wound goose biots have a bright natural translucency. I’ve tied it in diffferent colours of goose biot and its just as good on waters different to the chalkstream I fish.
Hook in Vice, wind a thread base along its length. Tie in three pheasant tail fibres to form tails. Once the tails are secured, catch in a peacock herl, and a single goose biot. Wind thread forward over butts to hold firmly in place.
Use hackle pliers rather than fingers to wind the biot as far as the main kink in the hook. Tie it down. Now carefully wind the biot, ensuring it is done with even spacing in order for the goose biot to show clearly through. Secure the end.
Select two CDC feathers – these are natural. Lay them on top of the hook, tips towards the bend, have just enough curling towards the bend so that when you curl them forward and secure at the eye, there isn’t very much to cut off as waste.
I’m not very pleased with this pic, I’ll replace it with a better one tomorrow. Dub the thread with more hares mask fur, particularly the spiky guard hairs, and wind over the hook shank towards the eye, stopping about 2mm from the eye. Curl the CDC feathers over together, over the dubbed hare, and tie down just before the eye, trim, and finish with a small head.