Just wanted to know if anyone here could show me how to tie a Fog Black. I have seen pictures of it and basic tying instructions for it but I really want to know, how is the Bullfinch's Wing tied to the fly. Most instruction .... even in P E Tritt's book it just says, Wings - from a Bullfinch's wing. Which part of the wing are the fibers supposed to be taken from? and how is it tied to the hook? Is there any alternative to Bullfinch's wings? Would appreciate all or any help on this one.