Back in the mid-80's, there was a guy who was in the California Highway Patrol who opened a small fly shop in Bridgeport, CA ( he only lasted two seasons before he was reassigned), where the East Walker River is located. He tied a lot of nymph patterns using Marabou for tails and shucks. His flies clobbered Trout up in the high elevation lakes and on West Walker River and the creeks that feed Bridgeport Res. Sometimes... I wonder why I don't tie more nymphs incorporating that concept...