An effective May Fly pattern, that's very similar to an Adams but always in its distinctive yellow/brown colors.
How it's tied
The March Brown's body is typically formed from dubbed fur, quill, or synthetic fibers, wrapped around the hook shank to create a slende shape. The tail is made from hackle fibers or pheasant tail fibers. The wing is a defining feature of the March Brown fly, consisting of upright and divided materials such as mallard flank feathers, turkey quill, or synthetic fibers. The hackle is tied around the base of the wing, creating a bushy collar that helps the fly float and imitate the natural legs of the mayfly.
As you'll see from it's design, the March Brown looks similar to an Adams fly.
What it mimics
The March Brown fly is designed to imitate the adult stage of the March Brown mayfly (Rhithrogena germanica or Rhithrogena morrisoni), a common and important food source for trout and other fish species during the early spring months.
Where it's used
The March Brown fly is used when targeting trout and other fish species that feed on adult mayflies, especially during the March Brown hatch.