The Bivisible Brown is one of the best flies for checking out new water. Its brown coloring and hackle-heavy body makes it super buggy which is why it’s an all-around great fishing fly. Trout tend to not know what these fly exactly are and can mistake them for a variety of insects. Fished with floatant and a dead drift, this fly is one of the best. A few of these in your box is always nice for checking out new water.