The TGBH Hare's Ear from Montana Fly Co. is a hare's ear nymph tied in size #10. Size #10 covers the naturals trout encounter most often.
Few patterns have caught more trout than the Hare's Ear. Its scruffy profile passes for mayfly nymphs and caddis larvae alike; fish it dead-drift along the streambed. A first-choice searching nymph on any trout stream.