I know I am probably a little silly----ok a lot. I started tying 3 years ago and am self taught. everything I learned was basicly from this site. It is a friend of mines b-day and I am tying him a bunch of flies. One of them is a size 20 & 18 zebra nymph. I searched for any info on how to make them and got a lot of info but everything I tried did not quite look right. The white stripe was to wide to narrow to bulky you get the picture. I had been tying some parachute flies and of course my bench was a mess. lying there was some excess calf tail hair. I tied it in as with the wire and thread I had previously used and wala it looked perfect so there is my tip: Use white calf tail hair for the stripe on zebra nymphs. Long winded huh