Let us break down the late season BEO Mayfly Hatch for you by life-stage and recommended fly pattern! Each life stage of a hatch is a different course in the mail that the fish are going to be eating throughout the day! For our BEOs, we are fishing the aquatic, nymph life stages (juju baetis and pheasant tails in sz 20) and we’re fishing these through the late morning until they start to emerger. For our emerging nymphs I like a chocolate thunder or rs2. As they transition at the surface of the