This is a high country rodent called the Mountain beaver, not the
common Canadian beaver. They are considered a pest in most areas
around here because they go after tree seedlings. But then so does
Bucky Beaver, as the Ponderosa seedlings on my place in Dayton
attest.
I am not the best source on the tying Q's as some can affirm :-)
but . . .

The fur is kind of a cross between muskrat and squirrel. I use it for
dubbing
my crude little nymphs. Fair amount of guard hair. Belly from whitish
to light grey/Brown. Back dark brown and grey. Very buggy. Easy to
pick out.

I got it from an old guy up on the Olympic peninsula, and I will
never
use it up so . . . . let me know and I will send it out after Xmas.

Dave