The CDC feather has wonderful floating capabilities, one of its best uses is in the shuttlecock. A deadly pattern wherever dark buzzers are hatching. Used on a floating line, the fly is cast out and then either wait for the trout to take the fly, or cover a rise with the fly.
Wind the thread down the hook shank to a point part way around the hook bend, catching in some fine gold wire as you go.
Dub some the body fur onto the thread and create a nice tapered body up to a position around 1/3 of the hookshank from the eye.
Take the fine gold wire and using even spaced turns create a rib up to where the tapered body stops.
Catch in a bunch of CDC feathers with the ends towards the eye. (Feathers towards the hook bend). Test the length of CDC feathers by pulling the feathers forward over the eye. You will need to experiment with the length and number of feathers, this varies with each size and type of hook.
Dub some the body fur onto the thread and create a nice bushy thorax
Pull the CDC Feathers over the thorax and secure with a few wraps over the eye.
Whip finish by securing the thread around the hook eye itself and not the CDC, this makes sure that the eye is clear of CDC feathers.
Pull the Hares Ear fibres out by using a dubbing puller or a piece of velcro. This creates a nice buggy effect.