Emergence is a time of emergency for aquatic insects. Struggling to shed their shucks and break free, at no time are they more vulnerable to trout looking up. Easy pickings. This tutorial from flyfishingwithsmhaen is big on production, with concise written instructions on a killer CDC pattern that will stick in the film and do a great imitation of a struggling bug. Changing up the dubbing color for the collar can make this fly pop in all hatches, though it is the bend of the hook that really gets this pattern cooking. CDC can be a pain to work with, but its properties make it well worth the hassle, and the results are always trout-nabbing goodness. For more CDC expertise be sure to check out his other videos, which make the stuff look too easy. Get the vice out and the bobbin spinning, and load your box.