The Old Duck Test

A close up of a Pacific Black Duck with an Australian Wood Duck in the backgroundThe old saying: If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck (known as the Duck Test), is an expression broadly used to infer that we should trust our judgement about what we are looking at. In the world of birds, there are few birds that look, swim and quack like a duck, so you are probably looking at a duck! But which one?

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