Try this low-riding Mayfly Dun for fussy trout that refuse a high-riding dry-fly.
CDC Mayfly Dun
Hook: Size 8 medium weight wet-fly
Thread: Olive
Tail: Moose mane
Body: Natural seal’s fur or any cream dubbing
Rib: Brown thread
Wing: Yellow and grey CDC, parted with thorax dubbing to form a split wing
Thorax: Hare’s fur