PMD’s, (pale morning dun’s) hatch more prolifically and over a longer period of time than any other mayfly in our area. They constitute a very important food source for the trout in Idaho rivers. Every angler should have a strong knowledge of their characteristics and life cycle. The parachute that we tie in this video imitates a pmd in the dun stage. A dun is a mayfly that has just emerged from the water. The time most commonly referred to as a “hatch” is when duns appear on the surface. The parachute patterns that mimic duns float better than any other imitations. When tied properly, they represent the insects very well. We hope you enjoy this tying instruction and have success spinning up some of your own.