The Zug Bug nymph pattern was invented by Cliff Zug as a caddis fly imitation. It also works well in many situations as a prospector, dropper, and even as a wet fly on the swing. Versatile and deadly, the Zug Bug resembles a broad range of larger sub aquatic insects. The tails on this pattern are heavily fibrous, and it can be used for many different species of fish. This is easily one of the top 10 fly patterns of all time.