Minor variation on the Gartside Sparrow; use the butt ends (wrapped) of the marabou for the body, palmered with grizzly dyed olive hackle. Don’t fish streamers that much any more, but last time I checked, it still got the fishes interest. Have had real good luck with this for trout in the east and west; smallies like it, too. Named after my neighbor, who first showed it to me after (not before, mind you 😉 ) he absolutely schooled a number of supposedly wary trout on a well-known PA spring creek with this fly.
hook – Mustad 36890 #6 (salmon hook not required but makes it look a bit classier)
thread – UTC 160 olive-brown
tail – marabou blood olive
body – butt ends of marabou, wrapped
rib – copper wire small
body hackle – saddle olive/grizzly
collar hackle – pheasant rump
head – pheasant aftershaft feather
attach thread to hook, wrap back to the bend, tying wire rib in

tie in marabou feather, let the tail extend about 1 shank length

grab butt ends (the feather’s, not yours) & twist into a rope/chenille

wrap forward and tie off at head.