There are about one thousand species of caddis in North America. At rest they hold their wings over their body resembling a tent and look similar to a moth. Caddis have a complete life cycle: egg, larva, pupa, and adult. The general life span of caddis is about one year. Most of this time is spent under water in the larva stage. The Caddis larva is either free living (net builders) or live in cases (cocoons) made of fragments of vegetation, sand or pebbles. Trout prey on Caddis in the larva through the adult stages. It's a good idea to have patterns that represent all three stages so you cover their life cycle. Caddis are very active insects and are always on the move, so adding movement to your fly pattern in the pupal and adult stages will generally provoke a strike. Swinging Caddis is not only fun but very productive . Here some of my patterns that I suggest, look them up in the store to get a better Idea of how they are built or pick some up if you don't tie.