I am unable to compose a better description of the why’s and wherefore’s of the comparadun style of fly than that which I created in my 02/21/2014 post. If you have any interest in this type of mayfly imitation, click on the link in the previous sentence. As the reader may suspect, I am a huge proponent of comparaduns, and the mayfly imitation that benefits the most from this affection is the pale morning dun. I always maintain an ample supply of cinnamon and light gray comparaduns in size 16 and 18, and rarely do they not produce trout during a pale morning dun hatch.
The best characteristic of the comparadun is the lack of need for expensive dry fly hackles. This feature also assures that the fly sits low in the water similar to a natural mayfly. The lack of hackle does, however, dictate strict adherence to several important tying steps, so reading the referenced 02/21/2014 blog post should be required reading.
As is the case with all my regular flies, I counted my supply of cinnamon and light gray comparaduns in size 16 and 18, and I determined that my supply was adequate. Oddly I reached the same conclusion during the winter of 2020. I accepted my good fortune and moved on to the next fly on my list for 2021.