There are No Ducks
In this present era of happy progressive Orwellian hope and change, if something walks like a duck, quacks like a duck and generally goes about the business of acting like a duck, not only are you discouraged from imagining, much less speaking of it actually being a duck, you’re probably a racist, right-wing, hyper-religious, Palin-worshipping nutcase for even recognizing the possibility that it might be so.
Of course, ducks aren’t really the problem here. Unless they vote Republican. (And why would any self-respecting creature of the wild ever do that?)