Some great looking flies submitted for this one -- thanks to all participants and a special shout out to Fire Instructor for filling in at the last minute to replace another swapper.
Czech Nymph
Tied by Famill00
Rojo ( y Verde
) Bead Head Midge
Tied by JoJer

Hook: Size 14 Daiichi 1720
Bead: Red glass craft bead
Thread and Body: 140 denier Olive Ultra Thread
Rib: 34 Gauge gold wire
Thorax: Peacock herl
Thread: 8/0 Lt. Olive UNI-Thread
Realistic Golden Stone
Tied by Stimulator2

Hook: 2xl Curved nymph/hopper size 6
Thread : Yellow Uni-thread size 6/0
Lead: .030 2 pieces tied along each side of hook shank
Abdomen: Translucent Nymph Skin or Tournque material
Tail: 2lb Maxima tippet material
Thorax: Golden Stonefly dubbing or a lighter yellow dubbing
Back: Soft Shell Golden Stone – size Large from Montana Fly –
Super Glue to dubbing (I add thread wraps between each
leg section and add durability then put head cement over
thread in dull the thread down some.)
Coloring : Prism Markers – Brown on the back and Lemon Yellow on bottom
Dr.'s Platinum Special
Tied by drlaser
Little Black Stonefly
Tied by Smalliesrule

Tail, Antennae and Rib: Black horsehair
Small Redheaded Nymph
Tied by LiphookedAu

Thread : Black
Hook: #12 Nymph Hook
Bead: Red Or Orange
Tail: Olive Marabou
Body:OliveDubbing
Rib : Fine Copper Wire
Wing Casing: Holographic Gold Tinsel
Thorax : Maroon Dubbing
Note from Brian: If you use an Orane Bead it becomes The Small Orange Head Nymph.
Crimson Sparkle Pheasant Tail Nymph
Tied by Mudbug

You can also use Olive Dubbing for the Thorax then it's becomes what I call The Greenie Meanie,also I don't use heavy beads.
Mallard and Peacock Stillwater Nymph
Tied by Webrx

Hook: Nymph 2xl
Thread: Tan
Tail: Mallard flank- do not trim exceess, this will be folded forward over body to form "shellback"
Rib: Ultrawire small
Body: Peacock Herl
Hackle: Grizzly palmered over body
Shellback: Mallard flank butts from tail pulled over back and tied down
You can see David's excellent Step By Step (SBS) for tying this pattern here:
Mallard and Peacock Nymph SBS
Impossihex
Tied by S fontinalis
Isonychia Nymph
Tied by Futuramille

Hook: Nymph
Bead: Gun metal colored brass
Thread: Black
Tail - peacock tips (six of the thirteen flies have pheasant flank but I finished with the peacock because I liked it better)
Body: First a layer of black rubber strand
-second, palmered ostrich (dark brown) trimmed top and bottom
-third, purple flash strand up the back for the stripe
-fourth, brown wire rib
Thorax: Peacock herl
Bead Head Pheasant Tail Nymph
Tied by Fire Instructor

Bead: Gold
Hook: Nymph
Thread: Black
Tail, abdomen, wingcase and legs: Pheasant tail fibers
Rib: Fine copper wire
Thorax: Peacock herl
Wingcase: Back raffia with a continued purple flash strand for the stripe
Legs: Tan mallard flank
Czech Nymph
Tied by Darwin