Caddis flies have been a staple trout pattern for fly-anglers throughout modern history. These Hot Wing Caddis flies are easy to follow as they drift downstream due to their brightly colored overwing. Per 2. Sizes: 10, 12, 14, 16, 18. Colors: Olive, Tan. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Flies.