Expect to see caddis on any summer evening on the Metolius, the Fall or the Deschutes. Unlike a lot of bugs that light on the surface, caddis can be active on the water. They struggle as they hatch out and skitter along the surface in their egg-laying ritual. All this activity makes the tent-winged insect a favorite target for trout on summer afternoons.
There are better patterns for fast water. Think elk hair when you want the bug to ride the riffle. But the Delta Caddis, with its delicate wings, is a good choice in flats with little current. Find a slow-moving eddy where the trout are rising to caddis and match your imitation to the natural.
Tie this pattern with brown thread on a No. 10-14 dry fly hook. Wrap the body with olive synthetic dubbing. Set the brown hackle wing tips at a 45-degree angle to the hook shank and finish with a brown hackle.
— Gary Lewis, For The Bulletin