AB's Polychenille:
Brun's Bibio

 

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Here's a tip on how to use the dark grey AB's Polychenille for your Hawthorn fly/ Bibio imitations to tie a good and durable body. This colour was developed for imitating dark stoneflies and Bibio flies. The colour is not dyed all black, but almost. Just like many black insects around our rivers and streams.

Brun's Bibio
Hook: R48, #12- 14
Thread: UNI 8/0, iron gray/ black
Extended body: AB's Polychenille, dark grey
Thorax: Fly-Rite, #2 or #7
Wings: Poly yarn, light grey
Wing case: Black Flyfoam or similar
Legs: Micro Round Rubber, black
 

Bibio marci and Bibio pomonae

The Bibio pomonae have some reddish orange colour on their upper legs. Just add some orange UNI- Thread or some orange Fly-Rite on to a part of the dubbing for the thorax to make B. pomonae imitations.

 

TYING INSTRUCTIONS:

1. Clip of a piece of dark grey AB's Polychenille.
Take a lighter and quicky burn of some of the fibres at the end, just to
make a somewhat tapered body.

 


2. Tie in the piece with some snug wraps as shown on the photo.
Total body length: About 12 mm.

The Mustad R48 hook is 2x short and very useful when tying flies with
extended bodies.

 


3. Blend some Fly-Rite #2 and #7 to get a colour similar to the dark grey
AB's Polychenille. Dub the rest of the body, no more than maximum half
the length of the hook shank. This way you'll leave ample room for tying in
the thorax of the fly.

You don't have to be all that nit- picking about the colours of this fly, so you
may aswell use Fly-Rite #2 (black) or just #7, but if you'd like you may blend
some 80% Fly-Rite #2, and 20% Fly-Rite #7, as I have done on the photo.

 


4. Take a thin piece of light grey poly yarn and tie it in on top to form the
wings.

 


5. Split the wings in two with your dubbing needle. Pull the pieces apart
before you make some firm wraps to secure them.

 


6. Clip of the excess pointing forward.

 


7. Cut out a narrow strip of black or dark grey Flyfoam. Tie it in on top
just in front of the wing.

 


8. Clip of the excess.

 


9. Now we are almost finished. A tip for tying in rubber legs with ease:
First you tie all six legs on top of the hook shank - all pointing forward.

 


10. Then clip of the excess, and spin on a small amount of dubbing.
Wrap the first round just behind the foam.

 


11. Now you wrap one snug round of dubbing at a time, and pull back the
rubber legs one by one as you continue dubbing the body. It's a very fine
and fast technique for managing those wiggling rubber legs and get
perfect control.

 


12. Continue forward with the dubbing, and at the same time bring the
rubber legs in position, one by one. Three on each side.

 


13. Now you see a finished thorax, that was tied just in seconds.

If you plan to tie some Bibio pomonae, instead of a B. marci, you just add
some orange dubbing over the black one at a narrow spot under the fly,
to get an impression of orange reddish upper legs. Just a loose bunch
of orange dubbing to make an impression of 'some orange'.

 


14. Fold over the Flyfoam and tie it in at the front. You don't want to put too
much pressure on the tying thread at this stage, as it will cut through the
foam, even when using a fine thread like the UNI.

 


15. The finished Brun's Bibio. Ready for a brown trout feeding frenzy.

You can order the material here: Go to ORDER PAGE.
 
Distributor of
AB's Polychenille in Norway

André Brun

Brun's Bibio - Bibio marci and Bibio pomonae

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