Bibio marci or St. Mark’s fl y is another terrestrial of the family Bibionidae. The name comes from the fact that the adults usually emerge around St Mark’s Day, 25th April. This is not the case in Norway & Scandinavia, we have a similar fl y here appearing in summer.
The very long trailing legs are a characteristic of the Bibio. The pattern is tied without hackle and relies on the foam wing-case to keep it afloat. It might seem like a rather simple tie, but tying with foam is not that easy. Compressing material onto a small hook and keeping the proportions realistic takes some practice.
The fly will sink slowly, like the real insect. However, the fly is often taken very shortly after it lands on the water. Fishing a Bibio “hatch” is a lot of fun, the fish are quick to respond, the takes can be fierce and exciting.
Hook: Standard dry fly hook size 14
Thread: Dyneema 55
Body: Black & hot orange seal’s fur dubbing
Wingcase: Closed cell foam
Legs: Knotted fibres from a pheasant tail feather
Fly Tying at Skålestrømmen
Fly tying classes are part of the inclusive packages we offer at Skålestrømmen. You can learn to make these all these flies yourself. Tying materials and tools will be supplied if cannot bring your own.
The fly shown works very well in Skålestrømmen (and around the world). There are of course many other, mostly more complicated types of flies that also work, but we like it simple and efficient.
However, do not worry. A selection of flies is included in the fly fishing packages we offer. You can also buy flies and materials in our flyshop.