Re: What is this fly called?
Looks like a "CDC Biot Emerger". It can be fished on top, or in the surface film. Appears to be a variation of a Harrop pattern.
The wing material is CDC.
"I've never missed a Steelhead by waiting too long. It's true, but I've missed plenty trying to set the hook too quickly." Dec Hogan 'A Passion For Steelhead'