It's one of those flies that seems to be able to catch almost anything, and has been responsible for catching browns, rainbows, salmon, bass and many more species. This variation is tied with a combination of Snow Runner Underwing and Long Hair Goat for a top wing. Silver Mylar Tubing for the body

The history of the Mickey Finn fly runs something like this: It was originally tied by Quebec fly tier Charles Langevin sometime in the 19th century. It was first known as The Langevin, but later renamed to The Assassin. This incarnation of the fly was popularized by outdoor writer John Alden Knight. Knight took another writer - Canadian Greg Clark - fishing and after such a trip, Clark announced that the fly was as dangerous as a Mickey Finn, referencing the drugged drink