If it walks like a duck and quacks like a duck then you really have something good looking. If it is one of us!

If it walks like a duck and quacks like a duck then you really have something good looking. If it is one of us!
You talkin’ to me? You talkin to ME!?
What do you mean, I’m not a duck? I look around and all I see are ducks, so I must be one, right?