Talon
Snow Rabbit feet, the ulitmate dry fly material.
This
is not just any old poor rabbit, but the Snow Rabbit
from about the Arctic Circle where if your not dry,
your dead.
So
nature produced one of it's little tricks in this
Rabbit's feet, feet that don't get wet, which results
in a wonder material for Dry fly Fishers like you
and me.
Please
Note, the image is not to scale, it is reduced to
fit this page ! 
Fly
patterns, almost endless, The Usual would have to
be considered one of the best.
http://www.xmission.com/~amundsen/dry1.htm#Usual
http://www3.sympatico.ca/royalwulff/boardswap/ken_obrien.html