REVERSE TIED BY COLOR NYMPH
Surprisingly this version of my ByColour Nymph is easier to tie than the original; perhaps because the materials go on in a more traditional sequence.
For clarity I have tied this example on a long shank size 12 hook. The ones I tie to use myself are usually on size 16 or smaller Swimming Nymph hooks.
What exactly does this resemble?
I REALLY like this pattern! and the photography was AWESOME!
Also:
you could EASILY do just tan dubbing, standard Pheasant tail fibers, and copper wire and it would be a Mayfly nymph!
Also:
you could EASILY do just tan dubbing, standard Pheasant tail fibers, and copper wire and it would be a Mayfly nymph! 
~Tom~