Intruder shanks, wire and hooks | Global FlyFisher | The major difference between almost any fly and an Intruder is the use of a shank and a trailing hook. This is about
Fly Tying Tutorial: The Intruder Bugger - JS-Outdoors
Intruder conversions | Global FlyFisher | I got the crazy idea to convert some Danish sea trout and salmon flies to intruders. It worked out surprisingly well.
How to Tie an Intruder Leech | MidCurrent
Senyo's Intruder Trailer Hook Wire For Sizes 6 Or Larger Grey #165 - Hareline Dubbin