Most patterns are black, olive, or brown with red ribbing (and red "butt" in some cases) to simulate the excess hemoglobin that they store in their bodies. These are some of the patterns that I fish regularly... partial to 1-strand of Sparkle Yarn for the gills as the bead slips over it easily after tie-in.
#14 "scud" hooks are the sizes that produce the best for me, but good to carry a variety in hook's #10 to #16.
Olive stretch-floss over red thread
Pheasant Tail fibres w/ Mirage tinsel shellback
Red stretch-floss over olive thread
Rowley's "Chromie"
Copper wire over green Flashabou
Chan's Black Sally (red Flashabou over black floss, coated w/ Sally Hanson's)
All have their moments... I usually start out with a 2-fly combo with a #12 Black Sally trailed by a smaller Chironomid (different color) and go from there.
If you want to see the masters at work, Chan and Rowley put together a fantastic video called Conquering Chironomids: [url "http://www.amazon.com/Conquering-Chironomids-Volume-Brian-Rowley/dp/B00ENT54HS"]http://www.amazon.com/...Rowley/dp/B00ENT54HS[/url]
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