January 21 is Squirrel Appreciation Day. Really. It was established by Christy Hargrove, a wildlife rehabilitator from North Carolina, to draw attention to the importance of these remarkably widespread creatures. Native to five continents and currently living on six (there"s no Antarctic squirrel), there are about 285 species of squirrels in the world, ranging from the tiny African pygmy squirrel to the Bhutan giant flying squirrel (when in Bhutan, be ready to duck).