![Haggard Hawks 🦅 on Twitter: "Because all swans were once presumed to be white, the Roman poet Juvenal used the expression BLACK SWAN to describe something unbelievable, or so fabulous as to Haggard Hawks 🦅 on Twitter: "Because all swans were once presumed to be white, the Roman poet Juvenal used the expression BLACK SWAN to describe something unbelievable, or so fabulous as to](https://pbs.twimg.com/media/D_L_nRUWwAAZDKu.jpg)
Haggard Hawks 🦅 on Twitter: "Because all swans were once presumed to be white, the Roman poet Juvenal used the expression BLACK SWAN to describe something unbelievable, or so fabulous as to
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)