Learn/Fly Box/Nymph/March Brown Nymph
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Nymph

March Brown Nymph

Spring stone-clinger nymph
Trout · GraylingSubsurface

Flat stone-clinger nymph of fast spring water — the March Brown nymph dead-drifted deep.

Fish this when

In early spring on fast, stony UK rivers ahead of the March Brown hatch, dead-drifted deep and tight to the streambed.

Why it works

Clinger nymphs like Rhithrogena hug boulders and only enter the drift briefly before hatching, so fishing deep and close to structure catches them at the one moment they're genuinely exposed.

Naturals it imitates
March Brown clinger nymph (Rhithrogena)
Typical zone & fishable range
usually
Surface
Film
Subsurface
Deep
Setup sensitivity: medium
Hook range#10–12
Quick facts
Tying difficulty
Intermediate