Variation of a Darbee Two Feather; not sure who came up with this version. Cool fly, pretty simple tie; good thing because I don’t see these standing up to much chewing. Tied here as a Green Drake (hence the slightly elongated wings); change color/size to suit your needs. In smaller sizes, you might want to try some different materials – mallard breast (natural or dyed), partridge?
hook – Dai Riki 125 #10
thread – Danville 6/0 olive
tail/body – mallard flank dyed olive
wings – hen hackle tips black
hackle – grizzly dyed olive