Bubble CDC Suspending Olive Midge (with photos)

Bubble CDC

Suspender Olive Midge

Pet name: Maslinasta CDC trzalica

Tier:  Andrija Urban


Instructions Below


This is a favorite creation of mine (1990) for care-free days on the lake from April to September.


Hook : #10 to #18.

Thread : Pre-waxed golden-olive green.

Respiratory Filaments : White CDC feather tied "loop" method (described below).

Tag : White colored floss (Floss).

Rib : Narrow Mother-of-Pearl tinsel (or silver).

Body : 2/3 golden olive-green Rayon fibers and 1/3 green Antron.

Thorax Hump : Pale yellow hare fur.

Head : Golden olive-green.


Note : Pay attention to the Rayon fibers. When they are cut in 1 cm length and compound with the antron, and softly dubbed while wet, gives the creation of an "alive" transparency which is needed for a good imitation of Midge pupas.


The CDC material used for the respiratory filaments, and the manner of tying, should make the midge unsinkable. By the reason of floatability you needn't use additionally floatants.


The correct position of the midge, as it falls on the water, should be floating and give a glassy silhouette. This is obtained through good visibility of white duck CDC feather.


Midges are for selective fly-fishing, when the midge pupas are helpless under the surface of the water. The feather by using the "loop method" is a "gentle" solution. You should now be prepared to understand this important characteristic.



Cul de Canard


I discovered the use of cul de canard (CDC) feathers for tying flies while fishing the River Krka of Dalmatia in 1964.  The CDC was tied in a local pattern called Supljak, which translated means "Duck Cloaca," the vicinity of a duck where the feather grows.  Since that time, I have treasured my fly models as "secrete weapons" and have worked to improved them, sometimes with more and sometimes with less enthusiasm.  They have undergone certain changes while seeking perfection but I do not think I have reached that point, yet.


I researched in an attempt to discover when CDC was first used for flies in my country but even the oldest generations of fly anglers couldn't remember it's discovery.  It was before their time.  


A few models of my creative fly models were displayed at a 1987 show in Ljubljana.  Dr Voljc was there and only examined them superficially.  He only commented that they were "interesting."  I then sent him some more models and requested he test them while fishing the Thymallus, where I lacked experience.  I respect Dr. Voljc's opinion and was hoping for his approval.  He made ordinary comments but the praise came in March 1989, when he published an article about them in his magazine, Ribic.  My "secrete weapons" were no longer secrete. 


Scroll down for Instructions.

This is a method rather than a pattern, so select the materials you desire.





Look at the picture above and you will see several unusual things that are needed to tie my midges, imitating pupas under the water's surface.  


There are some bent hooks, white duck CDC feathers, and a piece of plastic pipe (tubes).  You can use an electric wire isolator and a polished wooden dowel.  It is also important to choose feathers with a strong stem. 


The CDC loop, that "captures" a good bubble of air, is made with the help of the plastic tube and wooden dowel.  This solves the problem of proper floating position of midges.  The "Suspender Loop Midge Pupa" can float several days and maintain the characteristic of a natural's position.





Start at the eye of hook and build the shape of the head with thread (as shown).  It must be big enough to be able to separate the CDC feather from the shank. See picture at right.







Then, pull a good quality CDC feather through the plastics tube, extending about 1 cm to tie to hook.  Secure its convex part downward (pictured at left) on the built up thread. 





Then tie the desired tag, rib, body, etc., as desired.  I have used my favorite material in describing this tying step.


I must underline that the body and thorax material should be as soft as possible.


Do the "Loop Method" with a piece of wooded dowel as mentioned before.  It's maximum diameter depends on the size of hook.  For the size of 10 it's from 5 to 5.5 mm., for 12 it is 4 to 4.5 mm., 14 needs 3.5 mm., 16 needs 3 mm. 18 needs 2 mm., and for 20 it is 1,5 mm.



Tying a good loop is a delicate procedure.  Hold a small piece of wooden dowel with the tip resting on the hook shank so you can wrap the CDC around it.   When the CDC feather is wrapped to the extent desired, secure the tag end to the shank near where it was first tied in.  Cut the remainder away.





Prepare the material for the thorax and wrap behing the loop.  You can dub the thread in a whip finish know as shown to eliminate the thread from showing.  You must be sure to use the proper quantity of material for thorax shaping.


NOTE:  You may have a problem pulling the wooded dowel from the tied "embrace."   But I have solved that problem!  


Push the piece of wood toward the eye of the hook with the forefinger of your left hand.  Then with your right hand, rotate the wood to the left (direction of wind).  All feather fibers will slide around the wood better, and pulling the wood from the loop is done with minimum resistance.


After that, the feather "opens" and forms a closed ball-like sphere that holds a  maximum amount of air.  That air, combined with the nature of CDC, solves your floating problem with the "suspended" pupas of Chironomidae.



Bubble CDC Suspender Midges


There are several advantages of using such flies.  


A correct midge will silhouette on its first contact with water.  Not to be sunk!  


Visibility and additional weight of the leader is limited because it sinks into the surface film.  Also, there is minimum resistance while flying through the air.

The only disadvantage is the disproportion of the respiratory filaments between the natural and artificial fly!

Fly Tying and Fly Fishing: