Elephant

A large grey pachyderm, originally from Denmark, and known for painting either (a) the soles of its feet yellow, and/or (b) its toenails red, and hiding either (i) upside-down in custard; or (ii) in cherry trees; as the case may be. Also, one of four mythical beasts on whom the world, and the common law rests, and who in turn stand upon a stack of turtles.

A useful metaphor for railing ineffectually at wise counsel.