Fulling Mill Mayfly Thomas Yellow

For the two afternoons a year that matter

Big mayfly hatches do not happen often, and when one does the fish that never show themselves start rising. You might get two hours out of it, which is not the time to be experimenting, so this is a fly to have already tied on and already trusted. A large, carefully tied adult for those late afternoons. Good enough looking that plenty of them end up in a hat rather than in the water.