What it is
Hareline Swiss Straw is a thin, straw-like fly-tying material with a natural sheen. It’s durable for its thickness and it absorbs water, so it darkens and settles into a realistic, “wet” look once it’s fished. On the hook it lays flat and clean, which makes it handy when you want a crisp shell or wing shape without bulk.
What to tie with it
Use it for wing cases on nymphs and large stonefly nymph wing cases by tying it in over the thorax and pulling it forward as a shellback. It also works well for crustacean shellbacks on scuds and crayfish, and you can cut it to shape for realistic segmentation. For dries and emergers, it makes simple spinner wings, dry-fly wings, and emerger wings when you want a thin, translucent-looking profile.
Flies and the fish they're for
This is a go-to material choice when you’re tying nymphs and stonefly nymph imitations that get fished for trout in rivers, especially where big stoneflies are a major part of the drift. Used as a shellback on scuds and small crustaceans, it fits right into trout fishing on tailwaters and spring creeks where scuds are common forage. In crayfish patterns it supports streamer-style flies that get fished for smallmouth in rivers and lakes, and also for larger trout that key on crustaceans.
How it compares
Compared with Hareline Scud Back, Swiss Straw is a solid option for nymph wing cases but it also crosses over into dry and emerger wings where Scud Back isn’t the right fit. There isn’t a direct substitute called out for it here; the look and composition are its own thing.
