Frodin Zebra Hitch Fly
This I fish in the dusk or preferably on a cloudy day. The great contrast helps it stick out and give a good impression. I used to fish it on an orange tubing, but this more discrete silvery version is maybe I think better. For the dusk, I believe that the glow tubing adds to the impression and gives me the best dusk hitch fly in my box. In tricky conditions I sometimes try it fairly big.