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Thread: Osa nymph

  1. #1
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    Default Osa nymph

    OSA Nymph
    Hook #8 to 18
    Bead: Black to Gun metal black
    Weight: OPTIONAL LEAD WIRE
    Thread: Black
    Tail: 6 to 10 Pheasant tail barbs, depending on the size of the fly.
    Ribbing: copper wire
    Abdomen: Black possum or squirrel dubbing
    Thorax: White UV Dubbing

    Place bead behind hook eye, and wrap the optional lead wire behind bead.
    Tie in Pheasant tail in as tail and leave the long butt section, as this will become the legs.
    Tie in the copper wire
    Apply dubbing and wrap over the pheasant tail fibres, to about two-thirds up the hook shank.
    Rib with copper wire and tie off copper wire.
    Lift pheasant tail fibres up and dub thread and under the pheasant tail fibres to bead.
    Backward and forward wrapping of the UV dubbing can be done, to attain the right density, covering shape of thorax.
    Take pheasant tail batbs over UV dubbed thorax and tie in with 2 or 3 wraps behind the bead.
    SPLIT barbs in equal numbers and fold to either side of bead/body.
    Tie the barbs in at about 45 degrees to body and whip finish.
    Trim the barbs about two-thirds of the over all length of fly.

    This fly have caught many trout and yellowfish for me, over the last couple of years.
    It is one of my 4 or 5 top goto flies, when I start fishing.
    It is a general mayfly to stonefly nymph profile. The black bead and abdomen, gives a very good profile against any background and in any light conditions, with the UV dubbing add a different depth, dimension in the light and in the light spectrum.
    I paged thru some old magazines, the other day, and saw the TVN nymph, and thought there is something similar to the profile and color of the TVN nymph, what could be another reason for doing so well with the yellows.
    It has also produced a good number of fish on still waters. When I was looking at the water boatmen, backswimmers and corixia images on the net the other day, I realised why. The basic profile is very close to the water boatmen, backswimmers and corixia. But the UV thorax, makes a very good air bubble impersonation.
    Perhaps, for most fish, it looks, just too much like food, to not taste it.
    Attached Images Attached Images
    Last edited by Korrie; 07-04-14 at 08:48 AM.
    Korrie Broos

    Don't go knocking on Death's door, ring the bell and run like hell. He hates it. (anon)
    Nymphing, adds depth to your fly fishing.
    Nymphing, is fly fishing in another dimension

  2. #2
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    Default

    A couple of more photos
    Attached Images Attached Images
    Korrie Broos

    Don't go knocking on Death's door, ring the bell and run like hell. He hates it. (anon)
    Nymphing, adds depth to your fly fishing.
    Nymphing, is fly fishing in another dimension

  3. #3
    Join Date
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    Default

    a couple of more photos of a #8, 10 and #16 OSA nymph.
    Attached Images Attached Images
    Korrie Broos

    Don't go knocking on Death's door, ring the bell and run like hell. He hates it. (anon)
    Nymphing, adds depth to your fly fishing.
    Nymphing, is fly fishing in another dimension

  4. #4
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    Default

    an image of a corixia and water boatman. Easy to see why a still water trout will take the OSA as one of these
    Attached Images Attached Images
    Korrie Broos

    Don't go knocking on Death's door, ring the bell and run like hell. He hates it. (anon)
    Nymphing, adds depth to your fly fishing.
    Nymphing, is fly fishing in another dimension

  5. #5
    Join Date
    Dec 2006
    Location
    Johannesburg
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    909

    Default

    nice looking fly, small black nymphs have long been my favorite vaal flies
    Last edited by firephish; 07-04-14 at 08:42 AM.
    ---------------------------------------------
    http://wildjohannesburg.blogspot.com

  6. #6
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    Default

    Nice man! I like that!
    Bubble, Bubble, Bubble and Squeak...I think this mixture is too weak!!!???" (Wrex Tarr)

  7. #7
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    Jan 2007
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    Default

    One or 2 guys have commented that the UV White Thorax, can create the illusion of a hatching insect. Whatever, it catches fish, and lots of them. that is the most important.
    Korrie Broos

    Don't go knocking on Death's door, ring the bell and run like hell. He hates it. (anon)
    Nymphing, adds depth to your fly fishing.
    Nymphing, is fly fishing in another dimension

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