The Olive Partridge Caddis Emerger Pupa is especially effective when fish are seeing Caddis in the emergent stage. The Z-lon and synthetic materials on this fly reflect light in a lifelike manner and closely match natural emergers. Fish will often move several feet to take a Caddis emerger as they are easier to eat than the adults. The Partridge Caddis Emerger is effective when fished as a surface emerger, on the swing or as a nymph along the bottom. Every angler should have this effective fly when fishing water with hatching Caddis.