|These small light colored may flies were designed for the angler who would rather sleep late. Pale Morning Duns (PMDs) usually hatch mid to late morning. But, during some magic days, hatches can continue into the late afternoon. In our local rivers these hatches start in June and run into August. From our observation, this seems to be a fairly diverse group. Top of body coloration can range from light olive, to yellowish olive, to pale orange, to pink. Most typical top side coloration is usually pastel creamy yellow-olive with very light dun wings.