There are several variations of a March Brown and this happens to be ours. Works really well March through September and produces great results. When we've tried everything in the box, we'll throw this on and always be pleasantly surprised. Tied using some pearl krystal flash and CDC as the wing, it has just enough flash to attract those picky trout.
Remember this is a CDC wing so you'll need to keep it treated with just a small amount of Loon Lochsa and then some Frogs Fanny. You should only need to treat it with Lochsa once and then just reapply the Fanny as the day goes on. When you do catch a trout with this bug, you'll have to treat it.
Sizes #14 and #16 work really well.