Cooper Bug
Hook - Standard dry fly style, size 4-14
Thread - Red
Tail - Red hackle fibers
Ribbing - Flat gold tinsel
Body - Green yarn
Wing - Gray squirrel tail, divided
Head - Butt ends of the gray squirrel tail
References
Trout - Ray Bergman - Plate 15 and Page 467
Cooper Bug - Rocky River Trout Unlimited (rockyrivertu.org)
Fly Tying Friday - The Cooper Bug ? Panfish On The Fly
Fly Angler's OnLine "Cooper Bug - week 153 - Part 89 (flyanglersonline.com)