That's interesting. Are you talking about flies like these?I would tend to agree with arkle. There is a lot more to the "nymphing world" than just those two, and even if we disregard stillwaters and just concentrate on rivers there are three other inverts that trout and grayling feed on that you have neglected. Those are caddis, both free swimming and cased, stoneflies and shrimps, and I for one would never neglect an invert that probably is the mainstay of chalkstream fish's diet which is the latter of those three.
My main river nymph boxes contain more than 90% three flies - hare's ears, pheasant tails and shrimps with the shrimp making up at least 50% of those.
No, not really. Some of those are Killer shrimps for use at Grafham, and elsewhere that particular nasty is in residence. Most of the others are rather too gaudy. OK, but will tend to spook fish in clear water and grayling especially, will shy away from pink after a while.
I see the chalkstream agent you work with suggests a green shrimp in his hatch calendar very similar to the one in this link.No, not really. Some of those are Killer shrimps for use at Grafham, and elsewhere that particular nasty is in residence. Most of the others are rather too gaudy. OK, but will tend to spook fish in clear water and grayling especially, will shy away from pink after a while.
Mine are much more subdued and are made up with a seals fur mix of colours based on Frankie McPhillips Donegal Olive. They are in the sizes 16-12 with tungsten beads in 2mm up to 2.8mm. The bead colours are Metallic pink, metallic green, silver, black, copper, olive and gun metal. I put a small thorax of olive micro cactus chenille behind the bead. There is a shellback of clear Nymph Skin and a rib over that of copper wire.
I first found shrimps in trout in 1971 and have been tying them ever since, though I'm now on Mk. 10 as new materials have come on stream to improve upon the previous Mk. I do not plan on Mk11 but never say never. I, and others, have caught thousands of trout and grayling on that basic pattern. Would I consider it to be the only nymph I'll ever need? Certainly not!
In the small size it is useful on small stillwaters if it is weedy and you can see holes and pockets in the weedbeds. Chuck it into a hole and just let it sink. 10 seconds is long enough and two or three casts to the same hole is enough. Not for the faint-hearted this as you have to heave the fish out of the hole to stop him burying himself in the weed.
I put a short tail of Coq de Leon or light bronze mallard flank feather on mine, but do not bother with the body hackle or the feelers out front. I don't get many trout or grayling coming and asking where they are.