Charles Cotton #26 great hackle looks cool to me. or Walton #5. They are basically the same. So either one.
Walton 5:
Yellow or greenish fly (May)
Body: Yellow wool
Hackle: red capons neck or saddle (palmer)
*Hook Size: 12-14
Notes: #26 in Cotton

#26 Cotton
*Tying thread:Yellow
Body: Yellow
Rib: Gold twist
Hackle: red capon
Wing: mallard dyed yellow
*Hook Size: 12-14
Shad