Orange leaves insight, October Caddis delight. Consider it a blessing if you're lucky enough to have October caddis on a river near you. These are often the last big bugs of the season, and trout greedily and aggressively snatch them up in preparation for winter. However, RIO's Morrish Oct Caddis Adult is designed to entice trout all summer long, too, as this pattern is an outstanding imitation for any salmonfly hatch.