I was playing around with a Black Stonfly Nymph pattern tonight. The tail, shellback, wingcase and legs were all tied using Crow feathers. The only materials that weren't crow on this pattern were the dubbing, the black ultra wire rib and the beadhead. I designed this pattern to dredge the bottom as an anchor fly and with about 12 wraps of .020 lead wire flattened in the thorax and a 3/16 black tungsten bead it should sink like a rock. Keeping the crow theme on the forefront I have named it the "Black Cronefly".