Here's another great tying video from Tightline Productions - Tim Flager ties the Klinkhamer. It can be fished with success during mayfly, caddis or midge hatches, or as a general attractor - just change the size and color combination to match the hatch. This fly is also a very popular dry fly when using a dry/dropper combination. In short, this fly is a serious contender on most angler's top ten dry fly lists.
Tie some up and give them a try. Since winter is upon us, you'll want them in smaller sizes (#18 - 22), to imitate the midges that are often present on our rivers and streams.
Sharpen your hooks!