I have always thought of the Flymph as a cross between a wet fly and a nymph which is why it is called a "Flymph". To me, a collar is more representative of a wet fly and when I tie my Flymphs, I palmer the hackle part way down the thorax area or through all of the thorax area. Doing this gives a collar, as in a wet fly, and legs, as in a nymph. All I really know is that a "Flymph" has always been a good fish catcher for me and I call it my American Express because I never leave home to fly fish without it!