/ 
Where did this fly come from?
I've been tying this streamer for a few years now, based on Florian Stephan's model, the originator of the "Veron paonne" fly.
It represents a minnow and works pretty much all year round, even if few of us look for trout on streamers outside the early season.
The natural materials used give it a surprising realism and an enticing swim for lady fario, who often "taps" into these prey that are present all year round in our French waterways. I highly recommend it.
If you don't ride them, you can buy them at here.
I use this streamer to fish for trout in rivers, of course, but it also works in lakes, and could take other river fish such as chub, perch, even grayling which can become piscivorous for larger specimens (rare).
For what purpose?
Streamer trout fishing is generally done with special equipment, as flies of a certain size have to be cast.
Depending on the size and depth of the river, it's common to use 9-foot 5-bristle rods, but especially 6- and 7-bristle rods if you're really into this type of fishing and use streamers of a certain size, especially in medium to large rivers. On very large rivers, it is also possible to use switch or trout spey rods to cast farther, but also heavier silks or tips.
WF lines are generally used for ease of casting, whether rolled or overhead.
In order to offer your fly at the "right stage", it's common to use plunging tips called versileader or polyleader, which will slow down the drift and present your fly closer to the fish. A bit like fishing for migratory fish.
In this case, the tip should be a single-stranded line with a diameter suited to the size of the fish you're after, often ranging from 16° to 25° or more. With floating silk, a fast tapering leader will allow you to turn your tip and imitations.
On the wire too!
In recent years, with the development of nymph fishing with wire (NAF), some anglers, including myself, have been using this equipment and technique with a small streamer, often of a smaller size (for better penetration in the water and easier casting) to prospect spots as with nymph fishing. You replace your nymph with a streamer often mounted on a Jig hook with a tungsten ball, and tied on a stronger line in size 14/16 or 18°.
Fishing is mostly done in inert drifting, but you can also fish upstream as in nymphing. Animations can also be used to bring the fly to life. You can also let the streamer come downstream from your outfit and move it upstream along obstacles or the bank to find trout.
Assembly sheet
Size 4 Varivas 2500V streamer hook.
UTC 70 black mounting silk.
Position a 3 or 4 mm brass (or tungsten) gold bead.
Come to the bend and attach a small tuft of peacock (coq pardo for the original model) to form the tail.
Attach a gold copper wire and keep it on standby.
Form a loop of dubbing and trap hare's back (long to medium), ideally with longer hairs as you get closer to the front, then roll it up to form the body. Before the end of the body and about 2/3 of the way up the shank, place a small tuft of orange-red marabou (or hackle tip) on each side of the fly, then continue the body, stopping about 3 mm from the bead.
Form another loop of dubbing and insert long hare's back hairs. Form the thorax, then come also to block 3-4 cm of gold tinsel (holographic on the original model) on each side, and over a few peacock fibers to make the wing. Finish wrapping the hare behind the log. Using black varnish, place a small drop on the log to form an eye.
Add a small drop of UV resin on top and freeze for greater durability.
How do I use it?
Fishing is mainly done downstream, where the fly is cast at an angle of 90° to 30° to the opposite bank, depending on the depth and speed of the current. The fly is first cast downstream, then animated to imitate the swim of a drifting, swimming or wounded prey. Upstream casting is also possible, especially to make the fly sink even more.
You can either make inert drifts (without animation) to imitate a prey going downstream, especially in strong currents or very cold water, or animate your fly to give it life and simulate its usual behavior. In this case, you'll use short pulls and releases, or strips to bring your fly back to the bank you're on. Don't hesitate to animate your fly along the banks, as they are excellent spots for trout, especially at the start of the season.
Tips and tricks
I like to have this imitation in several sizes (4, 6, 8, but it's also possible to mount it in smaller sizes: 10, 12) but also to play with its ballasting (ball size, brass/tungsten) depending on flow and depth.
You can use it for downstream prospecting, but also for upstream casting. Personally, I often fish downstream at the start of the season, while casting upstream to get the fly into the right water column for the position.
Later in the season, when the water is clearer, it is advisable to fish ¾ upstream to be more discreet in view of the trout, which are not averse to taking a nice bite, especially at daybreak. Swim jerkily and animate by strip or pull and release around marked positions such as rocks, stumps, weedbeds. In fast currents, inert drifting also works well.
