A Very Strange Tail

This is something new.  This grey squirrel had the most interesting tail I've ever seen.  I just watched a show on NOVA that was all about squirrels.  They can pump extra blood into their tails if they are threatened to appear larger and, strangest of all, their brains increase in size by about 15% in the autumn so they can remember all the places they've hidden their stash of nuts.  The brain shrinks again in the spring.  A very strange tail tale.  

If you want to learn more about squirrel's nutty behavior, you can check this out.