OK, the subject of realistic fly patterns came up in the "tiny flies" thread. What exactly is meant by "realistic". I recently got those EthaFoam wings made bu Spirit River and I tied a BWO the other day using one of these rather than feathers or whatever for wings. Darn it looks realistic! But does it actually catch fish, and if so, why don't we always use wing shaped wings rather than hackle and feathers? Just wondering.