Some more amazing flies by Petter Gustavson - this is the caddis pupae as seen on the Fly Tying Forums. The detail on this fly is amazing - looks very similar to a pattern Chad Gauerke ties. Looks like the perfect Arkansas River fly to me!
Thsi is the second (of 3) Fly of the Day patterns that Petter has. I think I will need to get him to do a little interview for the blog.