Tying properly constructed dry flies is slightly more complex than putting a hook in the vise and being able to fashion the feathers and fur to the hook in a proper manner. Sometimes even well tied imitations fail because little or no thought was given to the hook model used, or how the imitation was to be fished, which included knowing the position of the rod tip at the time of the take. Sounds pretty involved, huh. Well it can be for those who want to maximize their effectiveness with dry fly imitations.