Tying instruction
 Dry flies

Borealis Dun

Target fish: trout / grayling

DRESSING:

Hook: 14 - 16
Mounting thread: olive

Body: natural rafia
Tails: 2 flashy fibers
Wings, Thorax, legs: braid of deer hair and grizzly hackles fibers
Notes: I started using this fly during the olive mayfly hatches in the arctic. Nonetheless, it has proven a reliable pattern at any latitude





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