Here's a fly i came up with for spring salmon and river smallmouth..big trout should like it also, its modeled after the banded -killifish, a common baitfish in a lot of rivers around here
Hook- size 4 single salmon hook, or long streamer
thread- black monocord
tail- banded woodduck flank
body- olive green floss
rib- silver med oval tinsel
under wing- yelllow bucktail
wing- pearl crystal flash
gills- orange saddle hackle tip