Most famous and most duplicated is the Adams fly. This pattern was developed by Len Halliday and was named after Judge Charlie Adams in 1922. This fly has probably been floated over more fish worldwide than any other. Tied in a traditional style with grizzly hackle wing tips or a parachute with a white deer hair post, this fly is fished in sizes 10 through 20. Originally this fly had a mix of brown and grizzly hackle barbules for the tail, but later most tiers and manufacturers used moose mane or moose body hair as tails because they are stiffer and made the fly float better. Either pattern is correct.