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The ephemera nymphs that swim just under the river surface, ready to make their last metamorphosis in winged insect, show small gaseous bubbles inside of their body, produced by the animals in order to facilitate their rising and to maintain themselves under the surface while they are facing the hatching. The insect abdomen appears so translucent, becoming nearly evanescent when the ephemera makes itself free from its juvenile dress. Under the fishing profile, or better under that one inherent the fly building, the up-wing that is crossing the culminating phase of its emerging stage can be imitated by all those artificials that keep air into their tissues and that have a not well defined shape. For this reason, many emergers are realised with dubbing of hairs or fibres, since such technique help the fly to keep small hair bubbles between its fuzzy body. Some materials, because of their fineness and water repellent peculiarities, are extremely appropriate for the creation of these flies, exalting their verisimilitude with the real ephemera.
  To this group of very imitative emergers belong those patterns which have the body tied with the kapok and the wing built with opossum hair, such as the fly showed in the photo, which was elaborated by me to imitate particular Baetis of ochre yellow colour and that I appreciate for the good buoyancy characteristic of its wings. Such quality renders the Emergente in Capoc, this is the name of my artificial, very indicated for fishing on the more turbulent and fast rivers: places where I often pretend that my fly does not sink completely, so to induce the fish to make a rise for taking it and to let me to do a timing strike.

INSTRUCTIONS

I face the first step of the Emergente in Capoc building by inserting the hook onto the vice jay and then winding the beige thread on to shank. Next I secure, over the bend, a tuft of partridge hackle fibres, placing it in order to represent the tails, and the tip of a natural red cock hackle stem

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I wax a section of thread and I distribute over it a pinch of dyed ochre yellow kapok. With the thumb and the index finger of my right hand, I compact the dubbing and I wrap it along the two rear third of the hook shank to make the abdomen

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With wide turns of the hackle stem around the body, I realise the ribbing

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From the pale brown dyed, or natural grey, opossum fur, I take a consistent tuft of hairs and I tie it in at the front edge of the abdomen, arranging it so that the hair tips extend backwards for a length equivalent to the double of the hook shank

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Using the dubbing spinner, I form a loop with the beige thread and I insert in it a pinch of hare hair. Next, I make a few turns of the dubbing spinner, in order to form a downy rope, and I wrap it around the front third one of the hook shank, so to create a robust thorax to the fly

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I push the opossum hair tuft forwards, placing it to cover the upper part of the thorax, and I secure it just behind the hook eye

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I realise now the fly head with a few turns of the beige thread, which is the finished with a whip-finish

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I complete the last step of the Kapok Emerger building by distributing a small drop of clear glue on the head, in order to make the fly more durable and able to resist to many battles on the river

MATERIALS LIST

HOOK: for caddis imitation size 18 to 12
THREAD. beige
TAI:. partridge hackle fibres
ABDOMEN: kapok dyed of ochre yellow
RIBBING: natural red cock hackle quill
THORAX: hare hair
ELYTRUMS AND WING TUFT: opossum hair dyed of pale brown, or natural grey