I love fly fishing. I am an International Federation of Fly Fishers Certified Two Hand Casting Instructor with fifty years experience in fly fishing, casting and fly tying to share. Please feel free to send me an e-mail and I will tell you what I know. My areas of knowledge are in fly fishing and fly tying for North Eastern trout, Landlocked salmon and the experience of over thirty five rivers world wide fly casting to Atlantic Salmon.
Larger trout, especially browns, like to eat big meals. I have been tying some bunny tail flies lately that are a take off of Vermont Guide, Mark Wilde's fly The Wilde Thing. A few different materials but essentially the same thing as far as the fish are concerned.
What the pattern mostly reminds me of is a simple Pheasant Tail Nymph. Tail, abdomen, wing casing, thorax and legs. Pretty simple but effective as any other fly I have been using lately. Mark ties the fly with a b it of weight on the top of the hook so the point rides up.
Give it a shot and fish them low and slow. Try something big and articulated. Change colors and materials, add flash or not as well as the weight. I think you will be very happy with the results.