I usually use hen for the tails on most of my nymphs. However, today I pulled out all the stops and used Coq De Leon for the tails on my small nymphs. What a great material. Its extremely durable. I was actually commenting to Davy on how good it was and all the other fly tails that it can be uses for. Its also barred, which is a good thing in my opinion. He also told me that he has some good stuff as well.
What materials do you guys use for tails? You might want to give the coq de leon a go. I have using mallard because it gets chewed off after a few fish. This stuff seems very tough and will withstand some trout chewing on it.