The Shipmans Bibio Barbless Size 12 combines the low-riding Shipman's emerger style with the contrasting black and red tones associated with Bibio patterns.
Fish it static in a ripple, allow it to drift through a wind lane, or retrieve it with the slowest figure-of-eight. The fly is best treated as a suggestive surface emerger rather than an exact copy of one insect. Apply floatant sparingly to the supporting fibres and keep the body in contact with the film. One solid take is often enough to make this a trusted favourite.