Dark Hendrickson - Dry Fly a fabulous Mayfly Dun imitation this is a killer fly on most rivers just match the size an colour to match the hatch and your will have a rod bending day. The Dark Hendrickson is a must have fly, I have personally had incredible results on our local Grand River with lots of Brown Trout over 18". Tied with a combination of grey muskrat fur, lemon wood duck flank and dark ginger hackle.