The Iris Caddis is brown is a scraggly looking trout fly that imitates an emerging caddis pupa. It’s disheveled look makes it one of the best and buggies emerger patterns for imitating caddis. Tied with a great top wing case that also helps the angler see the fly, this one is essential for any caddis hatch. Fishing these emergers behind caddis dry flies is a surefire way to get hits all along the river.