The larvae of Caddis are an important food source to trout in a lot of places. Fishing a fly to imitate them, at the correct time, is a recipe for success. However, there are a ton of different fly patterns out there all aimed at imitating these bugs. I've come to the opinion that usually the simplest caddis imitation is frequently the best, & you can't get a much simpler fly than this one in the video below. It's a pretty basic caddis larva fly, with a couple of very simple twists.
What I also like about this video is the showing of yet another way to make a dubbing rope. There are different ways of making a dubbing rope. Most of them require a specialized tool. This method requires none of that & shows something you could quickly do (even along the stream) when tying a fly that requires a dubbing rope.
So for more successful days along the stream, add some more Caddis to your trout's menu!! This video shows a good way to do just that.