Easy, its an Alexandra wet fly. Lots of slight variations of this one depending on location. Tied a lot of these for shops in BC in the 60's and 70's, named in honour of the Princess Alexandra.
Black 6/0 nylon
Red ibis, swan or goose wing feather (this one is blue and natural dunn)
Yellow Dubbing (often tie it with a double tinsel body)
Six or more strands of peacock herl over red duck, swan or goose wing feather
Fine oval silver tinsel
Black or brown tied wet