The traditional Peacock Spider is a great versatile fly, fished in both lakes and rivers.
Tied with Peacock herl and a saddle hackle collar, not much beats the natural iridescence of peacock herl.
The hackle creates a disturbance as the fly is pulled through the water. Fish it either shallow or deep, it will produce.
If snails are on the water, try one of these on a dead drift or slowly twitched through the water on a floating line.
Snails are often over-looked, they make up a large part of a Trout's diet.
In higher wind conditions fish this near the edges especially if there are weed beds around, snails often get dislodge form the weed beds in rougher conditions and float on or just beneath the surface.