Here's a similar pattern I tie that has proven well with steelhead. It is slightly more complicated.
Hook: Alec Jackson Spey or similar
Tag: oval silver tinsel
Tail: GP crest topping
rear 1/3 flat silver tinsel
front 2/3 kingfisher blue dubbing
Rib: oval silver throughout
Hackle: dark bl. schlappen from front 1/3 forward
Collar: kingfisher Bl. GP breast feather
Wing: light blue Arctic Fox.
Cheeks: Jungle Cock, optional.
if you're tying these in small sizes (8-10) you may want to substitute a whole body of flat silver tinsel for the dubbing and schlappen above, less complicated.
I've been a fan of the old SILVER BLUE salmon fly for summer/fall steehead here in the PNW. The main difference to the one M.J.Adams gave the pattern to is I use teal for the wing (as per the original featherwing from the 1800's) and don't consider the topping (golden Pheasant crest feather) optional. Also, I prefer to use very light blue hackle instead of fl. blue; although the slightly darker fl. blue works too.
Here's a small version of the Silver Grey we use in Newfoundland for Atlantics, mostly in sizes #10-#6, and usually fished hitched. In June, I'd say it's my #3 go-to fly. I tie a polar bear underwing (white or yellow) which helps support the teal, and adds a bit of wing sparkle.
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