I tie flies sporadically and use deer and elk hair for wings, bodies and occasionally spin bugs. I have quite a collection of various hair in various colors. All seem to work pretty well for what I tie, but I get confused when looking at material websites and all the different hairs available for different applications. For example, there is coastal, comparadun, whitetail, mule, hair for humpies, hair for spinning, all purpose, etc. All of this and then there is elk. I have read about hair quality and what you should look for in underfur, color division, length, etc, but why all the choses? Is it just personal chose or is there some golden rule for what type of hair should b used for different flies.