I have no experience with tanning hides but I love using squirrel hair in my flies. Like one post has stated, it makes great hares ears plus I tie a clouser using the longer hair from the gray squirrel tail for the belly and the longer hair from the fox squirrel tail for the top. The two colors together come pretty close to matching the small bottom minnows and crawfish in our local rivers here. The longer hair from the tails also makes some good streamers. The body hair I usually cut off and mix with other material in a coffee bean grinder to use as dubbing.

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Warren