According to the interpretive guide provided by the Friends of Nelder Grove, this stump resembles a howling wolf. Not a bad appraisal, really. "Howling aardvark" could work here, too. History is replete with examples of this sort of thing badly done - clear back in the 1880's, to cite just one example, Mark Twain was speculating that the Devil's Bake Oven in Illinois was "so-called, perhaps, because it does not powerfully resemble anybody else's bake oven" - but it's hard to find fault here.