Austrian angler Roman Moser devised this wonderful imitation of a caddis fly pupa at the very point of transposing into the adult. Rather than use a hackle to keep the fly floating, Roman went for a more modern approach with closed-cell foam. The foam provides the required buoyancy, but also mimics perfectly the bulge in the thorax as the adult caddis fly pulls itself from the pupal shuck. When using foam, the key is never to pull it too tight. Stretching will reduce the material's natural buoyancy and might well mean that it won't keep the fly afloat. The Balloon Caddis can be tied in a range of body colors, including amber and pale green. Effective hook sizes range from an 8 to a 16.
Brown elk hair
Yellow closed-cell foam
IFíx the hook in the vise and run the tying thread in touching turns to a position opposite the barb. Offer up a large pinch of olive Irisé Dub to the thread. Apply it so that it forms a loose yarn.
2 Make one turn of the yarn at the bend to lock the fibers. Continue twisting to form a strong, thick yarn, then cover two-thirds of the shank with it.
3 With the body in place add tight thread turns to form a base for the wing. Remove a pinch of brown elk hair, making sure that the tips are reasonably level.
4 Hold the hair on top of the hook and fix in place with three or four tight thread wraps. This will make the hair flare out. Secure with further tight turns and trim off the waste hair at the front.
5 Position the hair low over the hook with loose turns made at the wing base. Next, cut a thin strip of yellow foam and catch it in place at the eye. Wind the thread over the waste end of the foam, bringing it to the base of the wing.
6 Pull the foam back over the wing to form a pronounced thorax and secure with thread. Trim off the excess and cast off.
Brown trout y
Arctic char x>
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