QI - Quite Interesting - Until they were discovered in Australia, a "black swan" was used to describe something that couldn't possibly exist. | Facebook
The Nature Discovery Centre - Dashing black swan on the lake! Originally from Australia, they are similar in size to white or mute swans. Although they can look completely black in colour,
![How the black swan metaphor evolved, and why it shouldn't be confused with a grey rhino | South China Morning Post How the black swan metaphor evolved, and why it shouldn't be confused with a grey rhino | South China Morning Post](https://img.i-scmp.com/cdn-cgi/image/fit=contain,width=1098,format=auto/sites/default/files/styles/1200x800/public/d8/images/canvas/2022/04/14/d7d50813-7747-4876-be43-684546720381_52710d48.jpg?itok=4xN6YEzJ&v=1649899301)