Delectable RL Hot Butt Parachute #16

This mayfly dry fly in size #16 imitates mayfly duns on the surface.

Dead-drift it during mayfly hatches, matching the size and color of the naturals on the water.

It also makes a highly visible top fly in a dry-dropper rig, pulling double duty as strike indicator. Keep a few in different sizes to match the naturals you see on the water that day.