Tying Canadian Fly Patterns: the Crosfield (by Bob Petti) 

The Crosfield is very close to the Blue Charm in construction, though the images I've seen show it as a more robust looking fly. With the bigger wing, it would be a good fly for more turbulent flows.
This fly was taken from the book "A Compendium of Canadian Fly Patterns" by Robert H. Jones and Paul C. Marriner, Gale's End Press, Fly Fishing Canada Publications, 2006.

Спорт