Mark's Winter Baetis Emerger Trout Fly
Winter Baetis Mayflies can be very dark colored. Many nymphs are jet black. The outer skin of the nymph is transparent olive. It is stretched over the dark colored insect inside. As the nymph swims to the surface the adult insect is already separating itself from the nypmphal shuck. Bright green bands form at each abdominal segment.
As the skin splits down the back of the head and between the wing pads of the nymph, the dun starts to emerge through this tear. At this point, the insect can neither swim nor fly. It is completely helpless and a perfect target. The bright green reflective bands on the emerging insect are a key to the waiting fish.
Mark Bachmann pattern.
More Information on Winter Baetis Hatches