March Brown

The March Brown is a classic and widely recognized mayfly used by trout anglers, notable for its olive-brown to reddish-brown body, upright wings, and delicate, spindly profile that imitates a broad range of Ephemeridae species emerging in early spring; its hatch often triggers aggressive trout feeding, making both dry-fly and emerger presentations highly effective, while popular patterns—winged and parachute versions in sizes 12–18—are tied with soft hackles or CDC to suggest subtle, lifelike movement and flotation, and anglers favor matching the hatch with natural tones and a sparse profile to tempt selective fish during cool, low-light conditions typical of March and early spring streams.