As some of you have guessed, I've been examining Green Drake fly patterns. Because of my success with a cripple emerger pattern, I've been drawn to the matter of nymph colors. From the few pictures of the Green Drake nymph I've seen, the color seems much darker than the (dark?) olive recommended in the patterns. Even all the large mayfly nymphs I've ever seen on rocks seem dark enough to be closer to black than any olive color available. Is there something I'm missing? If I were to tie a variation of the Quigley Cripple, I'd really like to have the lower part of the pattern to be as close to the nymph's color as possible. Any suggestions or recommendations?